Revert "ci: Enable FreeBSD CI"

This partially reverts commit bfc362cb68.

The FreeBSD CI runner still seems to be a bit flakey, and appears to be
offline entirely at the moment.

Signed-off-by: Philip Withnall <withnall@endlessm.com>
Reviewed-by: nobody

.gitlab-ci.yml

@@ -128,6 +128,7 @@ vs2017-x64:
       - _build/meson-logs
 
 freebsd-11-x86_64:
+  when: manual
   stage: build
   tags:
     # To run a FreeBSD builder, install gitlab-runner package and start both
@@ -153,6 +154,9 @@ freebsd-11-x86_64:
     - meson ${MESON_COMMON_OPTIONS} -Db_lundef=false -Diconv=gnu -Dxattr=false _build
     - ninja -C _build
     - meson test -C _build --timeout-multiplier "${MESON_TEST_TIMEOUT_MULTIPLIER}"
+  # FIXME: Remove this when we have a stable FreeBSD runner
+  # https://gitlab.gnome.org/Infrastructure/GitLab/issues/286
+  allow_failure: true
   except:
     - tags
   artifacts: