build(ci): GitHub workflow to build for Intel-based Macs

.github/workflows/linux_amd64.yml

@@ -22,3 +22,5 @@ jobs:
               uses: gradle/gradle-build-action@v2
             - name: Build
               run: ./gradlew native_linux_amd64_gcc
+            - name: Check results
+              run: ls -l build/natives/linux_amd64_gcc

.github/workflows/macosx_amd64.yml

@@ -0,0 +1,28 @@
+name: MacOS amd64 (Intel)
+
+on: [push]
+
+jobs:
+    build:
+        runs-on: macos-12
+        steps:
+            - name: Install SWIG and CMake
+              run: |
+                brew install swig
+                brew install cmake
+            - uses: actions/checkout@v3
+              with:
+                submodules: true
+            - name: Set up JDK
+              uses: actions/setup-java@v3
+              with:
+                java-version: '11'
+                distribution: 'adopt'
+            - name: Validate Gradle Wrapper
+              uses: gradle/wrapper-validation-action@v1
+            - name: Setup Gradle
+              uses: gradle/gradle-build-action@v2
+            - name: Build
+              run: ./gradlew native_macosx_amd64_clang
+            - name: Check results
+              run: ls -l build/natives/macosx_amd64_clang