Make Travis happy

[domenukk]

The current Travis in this repo is taken from the upstream unicorn engine and apparently doesn't work all too well, probably because of the renaming to unicornafl.
It's not a big issue as it is part of the afl++ ci, but still can't hurt to get fixed.

[domenukk]

The windows tests fail (which is fine), but also the x86 test seems to segfault, which is not good!

[hexcoder-]

Added some details for this in AFLplusplus/AFLplusplus#343.
For me this is a 32-bit problem. When 32-bit binaries are used, it segfaults.

[domenukk]

I've built it with -m32 and can reproduce the segfault. Debugging...

[domenukk]

Current status:
cmake build still fails. I guess ignoring it would be enough.