add test linux build yaml

.github/workflows/build_linux_test.yaml

@@ -0,0 +1,47 @@
+name: Linux build example
+on:
+  workflow_dispatch:
+  push:
+jobs:
+  build:
+    runs-on: ubuntu-22.04
+    env:
+      AUTOBUILD_ADDRSIZE: 64
+      AUTOBUILD_VARIABLES_FILE: ${{ github.workspace }}/.fs-build-variables/variables
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+
+      - name: Setup python
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Checkout build variables
+        uses: actions/checkout@v4
+        with:
+          repository: FirestormViewer/fs-build-variables
+          ref: viewer
+          path: .fs-build-variables
+
+      - name: Checkout master-message-template
+        uses: actions/checkout@v4
+        with:
+          repository: secondlife/master-message-template
+          path: .master-message-template
+
+      - name: Install autobuild and python dependencies
+        run: pip3 install autobuild llsd llbase
+
+      - name: Install Linux dependencies
+        if: runner.os == 'linux'
+        run: sudo apt update && sudo apt install -y libgl1-mesa-dev libglu1-mesa-dev libpulse-dev build-essential git libssl-dev libxinerama-dev libxrandr-dev libfontconfig-dev libfreetype6-dev ninja-build
+
+      - name: Build
+        id: build
+        shell: bash
+        run: |
+          autobuild configure -A 64 -c ReleaseFS_open -- --no-opensim --avx2 --tracy --ninja --vscode
+          cd build-linux-x86_64 && ninja -k0