ci: add libdrm to the x86_test-vk container

Fixes: 5d0ba8b1834 (ci: Split building of libdrm to its own script)
Signed-off-by: Andres Gomez <agomez@igalia.com>
Reviewed-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9102>
2 files changed