gitlab-ci: Skip ext_timer_query/time-elapsed

This test's result is unpredictable, so it may occasionally pass when we
expect it to fail, thus causing the CI pipeline to fail.

Reviewed-by: Eric Anholt <eric@anholt.net>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3498>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3498>

.gitlab-ci.yml

@@ -555,6 +555,7 @@ piglit-quick_gl:
       -x arb_gpu_shader5
       -x egl_ext_device_
       -x egl_ext_platform_device
+      -x ext_timer_query@time-elapsed
       -x glx-multithread-clearbuffer
       -x glx-multithread-shader-compile
       -x max-texture-size

.gitlab-ci/piglit/quick_gl.txt

@@ -2012,7 +2012,6 @@ spec/ext_texture_srgb/multisample-formats 32 gl_ext_texture_srgb: skip
 spec/ext_texture_srgb/multisample-formats 4 gl_ext_texture_srgb: skip
 spec/ext_texture_srgb/multisample-formats 6 gl_ext_texture_srgb: skip
 spec/ext_texture_srgb/multisample-formats 8 gl_ext_texture_srgb: skip
-spec/ext_timer_query/time-elapsed: fail
 spec/ext_transform_feedback/tessellation quad_strip flat_first: warn
 spec/ext_transform_feedback/tessellation quads flat_first: warn
 spec/ext_window_rectangles/dlist/call: skip
@@ -2208,7 +2207,7 @@ summary:
        name:  results
        ----  --------
        pass:    19319
-       fail:      236
+       fail:      235
       crash:        2
        skip:     1948
     timeout:        0
@@ -2219,4 +2218,4 @@ summary:
     changes:        0
       fixes:        0
 regressions:        0
-      total:    21525
+      total:    21524