Jean-Sebastien Bevilacqua bc3fdcc8bd Sanitize ShaderLang.h
ShaderLang.h contains declaration for `ShLink` function which is never
defined.

See this grep output:

$grep -Hrn 'ShLink'
glslang/Public/ShaderLang.h:206:SH_IMPORT_EXPORT int ShLink(
glslang/Public/ShaderLang.h:214:SH_IMPORT_EXPORT int ShLinkExt(
glslang/MachineIndependent/ShaderLang.cpp:1268:int ShLinkExt(
2017-03-01 09:23:14 +01:00
..
2017-03-01 09:23:14 +01:00