gitlab-ci: increase clang-user timeout

The clang-user test exceeds the 1 hour timeout occassionally.

Philippe Mathieu-Daudé has pointed out that the number of tcg tests has
increased since QEMU 7.1. The execution time therefore probably reflects
a legitimate increase in tests rather than a performance regression.

Bump the timeout to prevent CI failures.

Suggested-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20221104113659.427690-1-stefanha@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

.gitlab-ci.d/buildtest.yml

@@ -327,6 +327,7 @@ clang-user:
   extends: .native_build_job_template
   needs:
     job: amd64-debian-user-cross-container
+  timeout: 70m
   variables:
     IMAGE: debian-all-test-cross
     CONFIGURE_ARGS: --cc=clang --cxx=clang++ --disable-system