add main branch files

.github/workflows/build-su.yml

@@ -0,0 +1,36 @@
+name: Build SU
+on:
+  push:
+    branches: [ "main", "ci" ]
+    paths:
+      - '.github/workflows/build-su.yml'
+      - 'userspace/su/**'
+      - 'scripts/ksubot.py'
+  pull_request:
+    branches: [ "main" ]
+    paths:
+      - 'userspace/su/**'
+jobs:
+  build-su:
+    name: Build userspace su
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - name: Setup need_upload
+      id: need_upload
+      run: |
+        if [ ! -z "${{ secrets.BOT_TOKEN }}" ]; then
+          echo "UPLOAD=true" >> $GITHUB_OUTPUT
+        else
+          echo "UPLOAD=false" >> $GITHUB_OUTPUT
+        fi
+    - name: Build su
+      working-directory: ./userspace/su
+      run: $ANDROID_NDK/ndk-build
+    - name: Upload a Build Artifact
+      uses: actions/upload-artifact@v4
+      with:
+        name: su
+        path: ./userspace/su/libs