Add simple compile test using Github Actions

Builds natively and cross compiles for Arm.

Signed-off-by: Joel Stanley <[email protected]>

.github/workflows/github-actions.yml

@@ -0,0 +1,19 @@
+name: CI
+on: [push, pull_request]
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install dependencies
+        run: sudo apt-get install -qq
+          gcc
+          gcc-arm-linux-gnueabi libc-dev-armel-cross
+          git meson device-tree-compiler qemu-user
+      - uses: actions/checkout@v2
+      - name: arm32
+        run: meson setup build-arm --cross-file meson/arm-linux-gnueabi-gcc.ini && meson compile -C build-arm
+      - name: native
+        run: meson setup build-native && meson compile -C build-native
+