ci/softpipe: Ban glx-multithread-texture, too.

This one also flakes on us.

Reviewed-by: Adam Jackson <ajax@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8275>

.gitlab-ci.yml

@@ -1241,10 +1241,12 @@ softpipe-piglit-quick:
     GALLIUM_DRIVER: softpipe
     # rasterpos skipped due to flakes from use-after-free of the draw vs.
     # triangle-rasterization skipped due to flakes thanks to it using a time-based random seed.
+    # glx-multithread-texture is flaky, undiagnosed
     PIGLIT_OPTIONS: >
       --process-isolation false
       -x rasterpos
       -x triangle-rasterization
+      -x glx-multithread-texture
       -x egl_ext_device_
       -x egl_ext_platform_device
       -x ext_timer_query@time-elapsed

.gitlab-ci/piglit/softpipe-quick.txt

@@ -3083,7 +3083,7 @@ wgl/wgl-sanity: skip
 summary:
        name:  results
        ----  --------
-       pass:    26802
+       pass:    26801
        fail:      399
       crash:       42
        skip:     2612
@@ -3095,4 +3095,4 @@ summary:
     changes:        0
       fixes:        0
 regressions:        0
-      total:    29884
+      total:    29883