Tag build swift-DEVELOPMENT-SNAPSHOT-2017-02-03-a
Merge remote-tracking branch 'origin/swift-4.0-branch' into stable

* origin/swift-4.0-branch:
  Merging r293345: ------------------------------------------------------------------------ r293345 | spatel | 2017-01-27 15:26:27 -0800 (Fri, 27 Jan 2017) | 19 lines
  Merging r292167: ------------------------------------------------------------------------ r292167 | davide | 2017-01-16 14:01:41 -0800 (Mon, 16 Jan 2017) | 3 lines
  Merging r293635: ------------------------------------------------------------------------ r293635 | nha | 2017-01-31 06:35:37 -0800 (Tue, 31 Jan 2017) | 16 lines