build(cmake): error build on warning (#2165)

packaging/linux/Arch/PKGBUILD

@@ -61,6 +61,7 @@ build() {
         -S "$pkgname" \
         -B build \
         -Wno-dev \
+        -D BUILD_WERROR=ON \
         -D CMAKE_INSTALL_PREFIX=/usr \
         -D SUNSHINE_EXECUTABLE_PATH=/usr/bin/sunshine \
         -D SUNSHINE_ASSETS_DIR="share/sunshine"

packaging/linux/flatpak/dev.lizardbyte.sunshine.yml

@@ -330,6 +330,7 @@ modules:
         npm_config_nodedir: /usr/lib/sdk/node18
         NPM_CONFIG_LOGLEVEL: info
     config-opts:
+      - -DBUILD_WERROR=ON
       - -DCMAKE_BUILD_TYPE=Release
       - -DCMAKE_INSTALL_PREFIX=/app
       - -DCMAKE_CUDA_COMPILER=/app/cuda/bin/nvcc