Disable CMake unused variable warning (#248)

Author: jamoralp

config/raspbian/generic/build.sh

@@ -10,6 +10,7 @@ pushd $FW_TARGETDIR/mcu_ws >/dev/null
             -DCMAKE_TOOLCHAIN_FILE=$PWD/toolchain.cmake \
             -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON \
             -DBUILD_SHARED_LIBS=OFF \
-            -DBUILD_TESTING=OFF
+            -DBUILD_TESTING=OFF \
+            "--no-warn-unused-cli"
     find ./install -executable -type f -name $APP_BINARY_NAME -exec cp {} $FW_TARGETDIR/bin/$APP_OUTPUT_NAME \;
 popd >/dev/null