add workflows

Signed-off-by: Shuang Zheng <[email protected]>

Author: szhen11

.github/workflows/pr.yml

@@ -0,0 +1,24 @@
+name: premerge
+
+on:
+  pull_request:
+    branches:
+      - master
+      - actions
+
+jobs:
+  build:
+    runs-on: acrn-shuang
+    
+    steps:
+      - name: Checkout master
+        uses: actions/checkout@v2
+        with:
+          ref: master
+
+      - name: Apply patches
+        run: echo "to apply patches"
+
+      - name: Build project
+        run: make clean && make
+