macOS: install libx11 on CI

.github/workflows/macos-build.yml

@@ -29,6 +29,11 @@ jobs:
     steps:
     - uses: actions/checkout@v2
 
+    # Install system dependencies
+    - name: Install system dependencies
+      run: |
+        brew install libx11
+
     # Force xmake to a specific folder (for cache)
     - name: Set xmake env
       run: echo "XMAKE_GLOBALDIR=${{ runner.workspace }}/xmake-global" >> $GITHUB_ENV
@@ -61,7 +66,7 @@ jobs:
 
     # Build the engine
     - name: Build Nazara
-      run: xmake build -v NazaraPlatform
+      run: xmake build -v NazaraRenderer
 
     # Run unit tests
     #- name: Run unit tests