Trivial header guard fix
Merge pull request #27 from MikePopoloski/master

Adding check for VS2015 build.
Merge pull request #26 from meshula/master

Trivial header guard fix
Updated GENie.
Added aarch64 and mips64.
Added NOMINMAX before windows.h include.
Merge pull request #28 from dariomanesku/master

Added NOMINMAX before windows.h include.
Updated GENie.
Merge branch 'master' of github.com:bkaradzic/bx
Fixed toolchain to use LLVM AR.
Fixed warning.