added a test to ensure VS macros are correctly handled in include paths.
added a test to ensure VS macros are correctly handled in include paths.

premake/premake-4.x,lizh06/premake-4.x,lizh06/premake-4.x,lizh06/premake-4.x,ryanjmulder/premake-4.x,premake/premake-4.x,ryanjmulder/premake-4.x,premake/premake-4.x,ryanjmulder/premake-4.x,ryanjmulder/premake-4.x,premake/premake-4.x,lizh06/premake-4.x