3fdea1567d
Summary:
1. hide those extensions for vtest since there's no export support
2. do block waiting upon export without implicit fencing support
Fixes: 68a478870d ("venus: expose KHR_external_fence/sempahore_fd extensions")
Signed-off-by: Yiwei Zhang <zzyiwei@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25633>