Source 'make build' fails

Hello,

Trying to build from source on Ubuntu 18.04 with Hashcat 5.1.0 but getting the following error:

# github.com/fireeye/gocat
In file included from /usr/local/include/hashcat/types.h:28:0,
from ./wrapper.h:5,
from ../gocat/gocat.go:9:
/usr/local/include/hashcat/ext_lzma.h:8:10: fatal error: LzmaDec.h: No such file or directory
#include

compilation terminated.
Makefile:14: recipe for target 'build' failed
make: *** [build] Error 2

So far I've built Hashcat in Shared mode and confirmed it works with my GPUs.

Any help would be greatly appreciated.

Start by reproducing `make build` on Ubuntu 18.04 with Hashcat 5.1.0, then inspect the Makefile target and the include chain through `wrapper.h` and `gocat.go`. Done means the source build completes without the missing `LzmaDec.h` error.

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