ci: Use --status-bugs option for scan-build

This removes the need to check the output directory for files.

.gitlab-ci.yml

@@ -100,10 +100,8 @@ test_scan_build:
   allow_failure: true
   script:
     - meson -Ddrivers=all . _build
-    # This is ugly, the wrapper disables the malloc checker
+    # Wrapper to add --status-bugs and disable malloc checker
     - SCANBUILD=$CI_PROJECT_DIR/.gitlab-ci/scan-build ninja -C _build scan-build
-    # Check that the directory is empty
-    - "! ls -A _build/meson-logs/scanbuild | grep -q ."
   artifacts:
     paths:
       - _build/meson-logs