Add gh actions

.github/workflows/build.yml

@@ -0,0 +1,20 @@
+name: Build and upload artifact
+
+on: [ push, pull_request ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: recursive
+      - name: Install depends
+        run: sudo apt-get install -y mingw-w64 clang
+      - name: Make
+        run: |
+          make dist-no-7z
+      - uses: actions/upload-artifact@v2
+        with:
+          name: dist
+          path: out/

Makefile

@@ -50,11 +50,14 @@ clean:
 patches:
 	make -C patches/8.18
 
-.PHONY: dist
+.PHONY: dist-no-7z
-dist: options ${OUT} ${patches}
+dist-no-7z: options ${OUT} ${patches}
 	mkdir -p out/plugins
 	cp ${TARGET}/${OUT}.dll out/
 	cp ${TARGET}/patches.*.dll out/plugins
 	cp dist/* out/
+
+.PHONY: dist
+dist: dist-no-7z
 	cd out && 7z a -t7z ../${OUT}.7z .
 	rm -rf out