util/perfetto: Add one-time init

Various places around mesa which might want to register a data-source,
etc, should call util_perfetto_init() first to ensure we connect to the
tracing service.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Antonio Caggiano <antonio.caggiano@collabora.com>
Acked-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9901>
4 files changed