Add and partially implement an interface for doing uniform reflection.  It includes an AST traversal to identify live accesses.  

It does not yet correctly compute block offsets, give correct GL-API-style type values, or handle arrays.

This is tied to the new -q flag.


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@23938 e7fa87d3-cd2b-0410-9028-fcbf551c1848