glsl: add component to has_layout() helper

I don't think this will do much as it's a compiler error
to use component without location which is already in the
table but its good to be consistent.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>

src/compiler/glsl/ast_type.cpp

@@ -74,6 +74,7 @@ ast_type_qualifier::has_layout() const
           || this->flags.q.row_major
           || this->flags.q.packed
           || this->flags.q.explicit_align
+          || this->flags.q.explicit_component
           || this->flags.q.explicit_location
           || this->flags.q.explicit_image_format
           || this->flags.q.explicit_index