CI: Disable OOM-testing code paths for Meson, matching Autotools and CMake

Repeatedly re-running each test with different malloc() calls failing
is really slow, and in particular this is making
dbus:dbus / marshal-recursive time out on freedesktop.org CI.

Signed-off-by: Simon McVittie <smcv@collabora.com>

tools/ci-build.sh

@@ -558,6 +558,10 @@ case "$ci_buildsys" in
 
         $meson_setup "$@" "$srcdir"
         meson compile -v
+
+        # This is too slow and verbose to keep enabled at the moment
+        export DBUS_TEST_MALLOC_FAILURES=0
+
         [ "$ci_test" = no ] || meson test --print-errorlogs
         DESTDIR=DESTDIR meson install
         ( cd DESTDIR && find . -ls)