Flesh out 4.x block redeclaration semantics:

 - hide non-redeclared anonymous members
 - array size limit checking
 - illegal member qualifiers
 - additional members


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@24406 e7fa87d3-cd2b-0410-9028-fcbf551c1848