When formatting the error here, we're currently casting an
ast_type_qualifier as a string.
But we don't need to use a string here at all, because we know from
context exactly what qualifier we're talking about, because the
if-statements explicitly check for the uniform-qualifier.
So let's just hard-code the format-string to reference the right
qualifier instead of the string-shenanigans. The latter cannot do the
right thing.
Fixes: 2d03f48a65 ("glsl: Add parsing for GLSL uniform blocks.")
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9911>
(cherry picked from commit 437ed05708)