Free disk space in container

Debug builds of clang require a lot of free disk space.

Author: jwnrt

.github/workflows/toolchain_build.yml

@@ -75,6 +75,12 @@ jobs:
           echo Creating artifact staging directory...
           mkdir "$ARTIFACT_STAGING_DIR"
 
+          echo ::group::Log free disk space
+          df -h || true
+          du -h / --max-depth 3 || true
+          du -h /__w --max-depth 3 || true
+          echo ::endgroup::
+
           # Git warns about this repo having dubious ownership - ignore.
           git config --global --add safe.directory "$(pwd)"
 
@@ -84,6 +90,9 @@ jobs:
             "${{ matrix.target }}" \
             "${{ matrix.output_dir }}"
 
+      - name: Log free disk space
+        run: df -h
+
       - name: Build Clang toolchain
         run: |
           ./build-clang-with-args.sh \