Corrupt Mach-O file

Bloaty gives a `Corrupt Mach-O file` error on a file.

`lipo -detailed_info` gives this output:

```
Fat header in: REDACTEDSdk
fat_magic 0xcafebabe
nfat_arch 5
architecture armv7
cputype CPU_TYPE_ARM
cpusubtype CPU_SUBTYPE_ARM_V7
offset 108
size 8291248
align 2^2 (4)
architecture armv7s
cputype CPU_TYPE_ARM
cpusubtype CPU_SUBTYPE_ARM_V7S
offset 8291356
size 8307560
align 2^2 (4)
architecture i386
cputype CPU_TYPE_I386
cpusubtype CPU_SUBTYPE_I386_ALL
offset 16598916
size 8294024
align 2^2 (4)
architecture x86_64
cputype CPU_TYPE_X86_64
cpusubtype CPU_SUBTYPE_X86_64_ALL
offset 34485416
size 8454008
align 2^3 (8)
architecture arm64
cputype CPU_TYPE_ARM64
cpusubtype CPU_SUBTYPE_ARM64_ALL
offset 24892944
size 9592472
align 2^3 (8)
```

The hexdump of the first part of the file is this:

```
0000000 ca fe ba be 00 00 00 05 00 00 00 0c 00 00 00 09 >................<
0000020 00 00 00 6c 00 7e 83 b0 00 00 00 02 00 00 00 0c >...l.~..........<
0000040 00 00 00 0b 00 7e 84 1c 00 7e c3 68 00 00 00 02 >.....~...~.h....<
0000060 00 00 00 07 00 00 00 03 00 fd 47 84 00 7e 8e 88 >..........G..~..<
0000100 00 00 00 02 01 00 00 07 00 00 00 03 02 0e 34 a8 >..............4.<
0000120 00 80 ff 78 00 00 00 03 01 00 00 0c 00 00 00 00 >...x............<
0000140 01 7b d6 10 00 92 5e 98 00 00 00 03 21 3c 61 72 >.{....^.....!ch>.#1/20 <
0000200 20 20 20 20 31 35 31 39 32 32 31 38 35 30 20 20 > 1519221850 <
0000220 35 30 31 20 20 20 32 30 20 20 20 20 31 30 30 36 >501 20 1006<
```