add /opt/swift/usr/bin and flutter-elinux/bin to path

Author: lhoward

Sources/CxxFlutterSwift/flutter-embedded-linux

@@ -34,7 +34,7 @@ export FLUTTER_ROOT=/opt/flutter-elinux
 export FLUTTER_SDK=${FLUTTER_ROOT}/flutter
 export FLUTTER_CACHE_ENGINEDIR=${FLUTTER_SDK}/bin/cache/artifacts/engine
 export DART_CACHE_BINDIR=${FLUTTER_SDK}/bin/cache/dart-sdk/bin
-export PATH=$PATH:${FLUTTER_SDK}/bin
+export PATH=$PATH:${FLUTTER_ROOT}/bin:${FLUTTER_SDK}/bin:/opt/swift/usr/bin
 
 # Package name of the build target Flutter app
 export SOURCE_DIR=${pwd}/Examples/${APP_PACKAGE_NAME}