virgl/ci: Set NIR_VALIDATE=0 on the host

As we aren't testing LLVMPipe in these jobs, and shader compilation is
currrently the bottleneck.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Reviewed-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12196>

.gitlab-ci/crosvm-runner.sh

@@ -30,6 +30,9 @@ echo 1 > /proc/sys/net/ipv4/ip_forward
 # Crosvm wants this
 syslogd > /dev/null
 
+# We aren't testing LLVMPipe here, so we don't need to validate NIR on the host
+export NIR_VALIDATE=0
+
 crosvm run \
   --gpu "$CROSVM_GPU_ARGS" \
   -m 4096 \