Create build_x86_64.yml

.github/workflows/build_x86_64.yml

@@ -0,0 +1,24 @@
+name: Build OpenJDK for Android
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-18.04
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    - name: set up JDK 1.8
+      uses: actions/setup-java@v1
+      with:
+        java-version: 1.8
+
+    - name: Build with CI build script
+      run: bash ci_build_arch_x86_64.sh
+
+    - name: Upload build output
+      uses: actions/upload-artifact@v2
+      with:
+        # name: jre
+        path: jre*.tar.xz