Add GitHub Actions config for Clang 4.0.1 builds

.github/workflows/build.yml

@@ -0,0 +1,27 @@
+name: build
+
+on:
+  # Trigger the workflow on push or pull request,
+  # but only for the master branch
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  build:
+    runs-on: [ubuntu-latest]
+    container:
+      image: leoetlino/botw-build:1.0.0
+
+    steps:
+    - uses: actions/checkout@v2
+    - run: git submodule update --init --recursive
+    - run: mkdir build
+    - name: Run CMake
+      run: cmake -GNinja -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCMAKE_TOOLCHAIN_FILE=../ToolchainNX64.cmake ..
+      working-directory: ./build
+    - name: Build
+      run: ninja -C build