.github: add CI pipeline

This pipeline builds the driver against the latest Xserver stable
release as well as current master.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>

.github/workflows/build.yml

@@ -0,0 +1,43 @@
+name: Build driver
+
+permissions:
+    contents: write
+
+env:
+    MESON_BUILDDIR:  "build"
+    X11_PREFIX:      /home/runner/x11
+    X11_BUILD_DIR:   /home/runner/build-deps
+
+on:
+    push:
+    pull_request:
+
+jobs:
+    for-xserver-stable-25_0:
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v4
+            - uses: ./.github/actions/build-driver
+              with:
+                  xserver-version: xlibre-xserver-25.0.0.5
+
+    for-xserver-master:
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v4
+            - uses: ./.github/actions/build-driver
+              with:
+                  xserver-version: master
+
+    release:
+        name: Release pushed tag
+        runs-on: ubuntu-latest
+        if: ${{ startsWith(github.ref, 'refs/tags/xlibre-') }}
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v4
+            - name: Create release
+              env:
+                  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+                  tag: ${{ github.ref_name }}
+              run: .github/scripts/github/make-release