[WIP] Investigate Xen job failure

The Xen job is failing due to timeout. Force a cache save even in case
the build fails so that the next build has a chance to succeed.

Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>

.github/workflows/ci.yml

@@ -322,6 +322,21 @@ jobs:
           cd ${TOP}/build
 
           make -j$(nproc) check XEN_BOOT=y
+      - name: Remove files on failure
+        if: always()
+        shell: bash
+        run: |
+          # Make room for the next step (build cache file and save it)
+          pwd
+          ls -l
+          rm -rf optee_repo_qemu_v8
+          rm -rf /__w/optee_os/optee_repo_qemu_v8
+      - name: Save build cache even on failure
+        uses: actions/cache/save@v3
+        if: always()
+        with:
+          path: /github/home/.cache/ccache
+          key: qemuv8_xen_check-cache-${{ github.sha }}
 
   QEMUv8_Hafnium_check:
     name: make check (QEMUv8, Hafnium)