- Use swift-3.1.1-RELEASE + cherry picking PRs:
swiftlang/swift#6858 - Enable sourcekitd to be built by default on Linux
swiftlang/swift#7392 - Build SourceKit on Linux if dispatch is present
swiftlang/swift#8189 - [Preset] include sourcekit-inproc in default install on Linux
swiftlang/swift#8485 - Enable SourceKit tests if building SourceKit - Creating symbolic link is not needed on this release since #3 has been fixed.