ci: Temporarily disable --fatal-meson-warnings on FreeBSD CI

For the same reasons as in commit 71061fdcb3, but in this
case we can’t downgrade the version of Meson on the CI runner, so just
tell it to shut up instead.

Signed-off-by: Philip Withnall <pwithnall@gnome.org>

.gitlab-ci.yml

@@ -457,7 +457,14 @@ freebsd-13-x86_64:
   before_script:
     - bash .gitlab-ci/show-execution-environment.sh
   script:
-    - meson setup ${MESON_COMMON_OPTIONS} --localstatedir=/var -Db_lundef=false -Dxattr=false _build
+    # FIXME: We can’t use ${MESON_COMMON_OPTIONS} here because the FreeBSD 13
+    # runner has Meson 1.3 installed. This has an API hole where previous
+    # methods of getting paths from files() objects are rejected as deprecated,
+    # but no replacements are available. Hence, we can’t build with
+    # --fatal-meson-warnings. This should be fixed in Meson 1.4. It’s also fine
+    # with Meson 1.2.3 (which is what we use on all the other CI runners).
+    # See https://github.com/GNOME/glib/commit/71061fdcb33b8c26f5f8467cb3ac10704d65c87d
+    - meson setup --buildtype debug --wrap-mode=nodownload --localstatedir=/var -Db_lundef=false -Dxattr=false _build
     - meson compile -C _build
     - bash -x ./.gitlab-ci/run-tests.sh
   artifacts: