ci: drop 'clang' test name filter in x86_64-gnu-debug

Author: jieyouxu

src/ci/docker/host-x86_64/x86_64-gnu-debug/Dockerfile

@@ -54,4 +54,4 @@ ENV RUST_CONFIGURE_ARGS \
 
 ENV SCRIPT \
   python3 ../x.py --stage 2 build && \
-  python3 ../x.py --stage 2 test tests/run-make --test-args clang
+  python3 ../x.py --stage 2 test tests/run-make