glsl: Add missing spec quote about atomic counter in structs
glsl: Add missing spec quote about atomic counter in structs

Reviewed-by: Thomas Helland <ca565e508460f734dd9d29a6ab6bd7e0e3ccde1d@gmail.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler