util/u_printf: fix memory leak in u_printf_singleton_add_serialized

info->arg_sizes and info->strings were leaked because they were
allocated in the global context.

Fixes: 007f60c8b8d ("util/u_printf: add singleton implementation")
Signed-off-by: Olivia Lee <olivia.lee@collabora.com>
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34987>
1 file changed