Enable C cache to speed up compilation

Signed-off-by: cachiusa <70309181+cachiusa@users.noreply.github.com>

.github/workflows/OrangeFox-Compile.yml

@@ -70,6 +70,11 @@ jobs:
         git clone https://gitlab.com/OrangeFox/misc/scripts.git -b master
         cd scripts
         sudo bash setup/android_build_env.sh
+
+    - name: Setup ccache
+      uses: hendrikmuhs/ccache-action@v1.2
+      with:
+        max-size: "10G"
       
     - name: Set-up Manifest
       if: github.event.inputs.MANIFEST_BRANCH == '11.0' || github.event.inputs.MANIFEST_BRANCH == '12.1'
@@ -93,6 +98,8 @@ jobs:
       run: |
         cd ${GITHUB_WORKSPACE}/OrangeFox/fox_${{ github.event.inputs.MANIFEST_BRANCH }}
         set +e
+        export USE_CCACHE=1
+        export CCACHE_EXEC=/usr/bin/ccache
         source build/envsetup.sh
         export ALLOW_MISSING_DEPENDENCIES=true
         set -e