arb_es2_compatibility: Check return value.
Calling piglit_link_check_status without checking return value
Reported-by: Coverity Scan
Signed-off-by: Vinson Lee <vlee@freedesktop.org>
Calling piglit_link_check_status without checking return value
Reported-by: Coverity Scan
Signed-off-by: Vinson Lee <vlee@freedesktop.org>