ci: clang: add permissions

Signed-off-by: Anas Nashif <[email protected]>

Author: nashif

.github/workflows/clang.yaml

@@ -5,6 +5,8 @@ on:
       - main
       - v*-branch
       - collab-*
+permissions:
+  contents: read
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.head_ref || github.ref }}
@@ -26,6 +28,7 @@ jobs:
       CCACHE_DIR: /node-cache/ccache-zephyr
       CCACHE_REMOTE_STORAGE: "redis://cache-*.keydb-cache.svc.cluster.local|shards=1,2,3"
       CCACHE_REMOTE_ONLY: "true"
+      CCACHE_IGNOREOPTIONS: '-specs=* --specs=*'
       LLVM_TOOLCHAIN_PATH: /usr/lib/llvm-16
       BASE_REF: ${{ github.base_ref }}
     steps: