Fix for glslang_vs2013.vcxproj: One source file was marked as CLInclude...

Fix for glslang_vs2013.vcxproj: One source file was marked as CLInclude instead of CLCompile, which caused link errors. 

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@24209 e7fa87d3-cd2b-0410-9028-fcbf551c1848