tests/all.py: Skip EGL specific tests on a pure glx platform

wayland, X11, and gbm *can* be built with egl support, these are
determined by the driver. However, glx does not have egl support, and
probably cannot have egl support. In the case where a pure glx platform
is specified we can fast skip egl tests

Signed-off-by: Dylan Baker <dylanx.c.baker@intel.com>
1 file changed