mesa: Add support for querying GL_VERTEX_ATTRIB_ARRAY_LONG
mesa: Add support for querying GL_VERTEX_ATTRIB_ARRAY_LONG

This parameter was added in OpenGL 4.3 and GL_ARB_direct_state_access.

Reviewed-by: Laura Ekstrand <94745df4bd94de756ea5436584fec066fc7898d5@jlekstrand.net>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler