Add src/gradle to the gitignore in the buildroot (#506)
Add src/gradle to the gitignore in the buildroot (#506)

Gradle is now a dependency in flutter/DEPS
(see https://github.com/flutter/engine/commit/22af55c9349759db81c9577cec25a58ae2d81c4f)
flutter/buildroot,flutter/buildroot,flutter/buildroot,flutter/buildroot