Panic: unexpected signal during runtime execution

Getting this from a statically compiled binary. Works fine when dynamically compiled.

```
fatal error: unexpected signal during runtime execution
[signal SIGSEGV: segmentation violation code=0x1 addr=0x47 pc=0x7f3450161f23]

runtime stack:
runtime.throw(0x990298, 0x2a)
/usr/lib/go-1.8/src/runtime/panic.go:596 +0x95
runtime.sigpanic()
/usr/lib/go-1.8/src/runtime/signal_unix.go:274 +0x2db

goroutine 13 [syscall, locked to thread]:
runtime.cgocall(0x7b3420, 0xc420037910, 0x98fc19)
/usr/lib/go-1.8/src/runtime/cgocall.go:131 +0xe2 fp=0xc4200378d0 sp=0xc420037890
github.com/google/gopacket/pcap._Cfunc_pcap_compile(0x7f34400009f0, 0xc420a68390, 0x7f34400008e0, 0x1, 0x0)
github.com/google/gopacket/pcap/_obj/_cgo_gotypes.go:230 +0x4d fp=0xc420037910 sp=0xc4200378d0
github.com/google/gopacket/pcap.(*Handle).compileBPFFilter.func4(0x7f34400009f0, 0xc420a68390, 0x7f34400008e0, 0x1, 0xffffffff)
/root/go/src/github.com/google/gopacket/pcap/pcap.go:513 +0x116 fp=0xc420037958 sp=0xc420037910
github.com/google/gopacket/pcap.(*Handle).compileBPFFilter(0xc4211c0d20, 0xc420056120, 0x5c, 0x0, 0x0, 0x0, 0x0)
/root/go/src/github.com/google/gopacket/pcap/pcap.go:513 +0x1c1 fp=0xc4200379c0 sp=0xc420037958
github.com/google/gopacket/pcap.(*Handle).SetBPFFilter(0xc4211c0d20, 0xc420056120, 0x5c, 0x0, 0x0)
/root/go/src/github.com/google/gopacket/pcap/pcap.go:555 +0x7e fp=0xc420037a20 sp=0xc4200379c0
bitbucket.org/r0t3n/nodemon/stream.(*Monitor).MonitorInterface(0xe03660, 0xc420a719b0, 0x6, 0xc420056120, 0x5c, 0x0, 0xa, 0xc420010100, 0x0, 0x0, ...)
/root/go/src/bitbucket.org/r0t3n/nodemon/stream/stream.go:262 +0x6c7 fp=0xc420037ee8 sp=0xc420037a20
bitbucket.org/r0t3n/nodemon/nodemon.(*Nodemon).Run.func3(0xc4211f7200, 0xc42000e1e0, 0xc4212726b0, 0xc4212726c0)
/root/go/src/bitbucket.org/r0t3n/nodemon/nodemon/nodemon.go:233 +0x119 fp=0xc420037fc0 sp=0xc420037ee8
runtime.goexit()
/usr/lib/go-1.8/src/runtime/asm_amd64.s:2197 +0x1 fp=0xc420037fc8 sp=0xc420037fc0
created by bitbucket.org/r0t3n/nodemon/nodemon.(*Nodemon).Run
/root/go/src/bitbucket.org/r0t3n/nodemon/nodemon/nodemon.go:236 +0x1bdc

goroutine 1 [chan receive]:
github.com/kardianos/service.(*systemd).Run.func1()
/root/go/src/github.com/kardianos/service/service_systemd_linux.go:138 +0xe7
github.com/kardianos/service.(*systemd).Run(0xc42117d5a0, 0x996770, 0xc4200576e0)
/root/go/src/github.com/kardianos/service/service_systemd_linux.go:139 +0xc0
main.main()
/root/go/src/bitbucket.org/r0t3n/nodemon/main.go:50 +0x2a5

goroutine 17 [syscall, locked to thread]:
runtime.goexit()
/usr/lib/go-1.8/src/runtime/asm_amd64.s:2197 +0x1

goroutine 6 [syscall]:
os/signal.signal_recv(0x0)
/usr/lib/go-1.8/src/runtime/sigqueue.go:116 +0x104
os/signal.loop()
/usr/lib/go-1.8/src/os/signal/signal_unix.go:22 +0x22
created by os/signal.init.1
/usr/lib/go-1.8/src/os/signal/signal_unix.go:28 +0x41

goroutine 7 [chan receive]:
main.main.func1(0xc4200576e0)
/root/go/src/bitbucket.org/r0t3n/nodemon/main.go:36 +0x57
created by main.main
/root/go/src/bitbucket.org/r0t3n/nodemon/main.go:41 +0x27c

goroutine 8 [chan receive]:
database/sql.(*DB).connectionOpener(0xc421274640)
/usr/lib/go-1.8/src/database/sql/sql.go:837 +0x4a
created by database/sql.Open
/usr/lib/go-1.8/src/database/sql/sql.go:582 +0x212

goroutine 12 [chan receive]:
bitbucket.org/r0t3n/nodemon/stream.(*Monitor).MonitorInterface(0xe03660, 0xc420a718d0, 0xa, 0xc420056120, 0x5c, 0x0, 0xa, 0x10100, 0x0, 0x0, ...)
/root/go/src/bitbucket.org/r0t3n/nodemon/stream/stream.go:306 +0xe07
bitbucket.org/r0t3n/nodemon/nodemon.(*Nodemon).Run.func3(0xc4211f7180, 0xc42000e1e0, 0xc4212726b0, 0xc4212726c0)
/root/go/src/bitbucket.org/r0t3n/nodemon/nodemon/nodemon.go:233 +0x119
created by bitbucket.org/r0t3n/nodemon/nodemon.(*Nodemon).Run
/root/go/src/bitbucket.org/r0t3n/nodemon/nodemon/nodemon.go:236 +0x1bdc

goroutine 10 [chan receive]:
bitbucket.org/r0t3n/nodemon/nodemon.(*Nodemon).Run(0xc42004d770, 0x0, 0x0)
/root/go/src/bitbucket.org/r0t3n/nodemon/nodemon/nodemon.go:249 +0x57c
created by bitbucket.org/r0t3n/nodemon/nodemon.(*Nodemon).Start
/root/go/src/bitbucket.org/r0t3n/nodemon/nodemon/nodemon.go:101 +0x6fe

goroutine 11 [select, locked to thread]:
runtime.gopark(0x996d20, 0x0, 0x970300, 0x6, 0x18, 0x2)
/usr/lib/go-1.8/src/runtime/proc.go:271 +0x13a
runtime.selectgoImpl(0xc420035f50, 0x0, 0x18)
/usr/lib/go-1.8/src/runtime/select.go:423 +0x1364
runtime.selectgo(0xc420035f50)
/usr/lib/go-1.8/src/runtime/select.go:238 +0x1c
runtime.ensureSigM.func1()
/usr/lib/go-1.8/src/runtime/signal_unix.go:434 +0x2dd
runtime.goexit()
/usr/lib/go-1.8/src/runtime/asm_amd64.s:2197 +0x1

goroutine 15 [runnable, locked to thread]:
github.com/google/gopacket/pcap._Cfunc_pcap_next_ex(0x7f34440009f0, 0xc4211c0950, 0xc4211c0958, 0x0)
github.com/google/gopacket/pcap/_obj/_cgo_gotypes.go:435 +0x4d
github.com/google/gopacket/pcap.(*Handle).getNextBufPtrLocked.func1(0x7f34440009f0, 0xc4211c0950, 0xc4211c0958, 0x1)
/root/go/src/github.com/google/gopacket/pcap/pcap.go:357 +0x198
github.com/google/gopacket/pcap.(*Handle).getNextBufPtrLocked(0xc4211c0910, 0xc420023eb0, 0x0, 0x0)
/root/go/src/github.com/google/gopacket/pcap/pcap.go:357 +0x59
github.com/google/gopacket/pcap.(*Handle).ReadPacketData(0xc4211c0910, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
/root/go/src/github.com/google/gopacket/pcap/pcap.go:307 +0x77
github.com/google/gopacket.(*PacketSource).NextPacket(0xc421280a80, 0x996b00, 0xc420057a40, 0x0, 0xc420a71cd8)
/root/go/src/github.com/google/gopacket/packet.go:795 +0x48
github.com/google/gopacket.(*PacketSource).packetsToChannel(0xc421280a80)
/root/go/src/github.com/google/gopacket/packet.go:812 +0x5d
created by github.com/google/gopacket.(*PacketSource).Packets
/root/go/src/github.com/google/gopacket/packet.go:835 +0x94