enable header files from subdirectories
enable header files from subdirectories

Adding all subdirectories of specified "framework_root" option as argument to sourcekitten. This enables references inside the umbrella header to other source files that are within subdirectories of the "framework_root".
For details see https://github.com/realm/jazzy/issues/518

realm/jazzy,PSPDFKit-labs/jazzy,PSPDFKit-labs/jazzy,realm/jazzy