GL_ARB_enhanced_layouts, part 2:  Full implementation of location/component, plus the parsing for xfb* and align/offset (but not yet full semantics for align/offset).


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@24692 e7fa87d3-cd2b-0410-9028-fcbf551c1848