Fix gradle incremental build.
Fix gradle incremental build.

Incremental build fails if generated source dirs are in main sourceSet.
Giving up on annotation processing within IntelliJ for now.

jongerrish/robolectric,jongerrish/robolectric,jongerrish/robolectric,spotify/robolectric,jongerrish/robolectric,spotify/robolectric,spotify/robolectric