This change permits (1) a relative --flutter-shell (2) relative (source, dill) entries within the test JSON file and enables portability in the invocation scripts produced by fuchsia's dart test GN template.
Flutter Tools
Developer tools for building Flutter applications.
Be sure to follow the instructions on CONTRIBUTING.md to setup.
To run the tests, ensure that no devices are connected,
then navigate to flutter_tools and execute:
../../bin/cache/dart-sdk/bin/pub run test