[llvm] [libc++] Adjust the docker-compose file for libc++ action builders (PR #116366)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-github-workflow

Author: Louis Dionne (ldionne)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/116366.diff


1 Files Affected:

- (modified) .github/workflows/libcxx-build-containers.yml (+6) 


``````````diff
diff --git a/.github/workflows/libcxx-build-containers.yml b/.github/workflows/libcxx-build-containers.yml
index 92b2e3056da9ac..2d040f712ce592 100644
--- a/.github/workflows/libcxx-build-containers.yml
+++ b/.github/workflows/libcxx-build-containers.yml
@@ -29,6 +29,8 @@ jobs:
   build-and-push:
     runs-on: ubuntu-latest
     if: github.repository_owner == 'llvm'
+    permissions:
+      packages: write
 
     steps:
     - uses: actions/checkout at v4
@@ -36,10 +38,14 @@ jobs:
     - name: Build the Linux builder image
       working-directory: libcxx/utils/ci
       run: docker compose build actions-builder
+      env:
+        TAG: ${{ github.sha }}
 
     # - name: Build the Android builder image
     #   working-directory: libcxx/utils/ci
     #   run: docker compose build android-buildkite-builder
+    #   env:
+    #     TAG: ${{ github.sha }}
 
     - name: Log in to GitHub Container Registry
       uses: docker/login-action at v3

``````````

</details>


https://github.com/llvm/llvm-project/pull/116366