Update src/ci/docker/host-x86_64/mingw-check/Dockerfile

Co-authored-by: Joshua Nelson <github@jyn.dev>

Author: Gimgim

Diff for: src/ci/docker/host-x86_64/mingw-check/Dockerfile

@@ -36,7 +36,7 @@ ENV SCRIPT python3 ../x.py --stage 2 test src/tools/expand-yaml-anchors && \
            python3 ../x.py build --stage 0 src/tools/build-manifest && \
            python3 ../x.py test --stage 0 src/tools/compiletest && \
            python3 ../x.py test --stage 2 src/tools/tidy && \
-           python3 ../x.py test --stage 0 library/std && \
+           python3 ../x.py test --stage 0 core alloc std test proc_macro && \
            python3 ../x.py doc --stage 0 library/test && \
            /scripts/validate-toolstate.sh && \
            /scripts/validate-error-codes.sh && \