Merge remote-tracking branch 'origin/swift-4.0-branch' into stable
* origin/swift-4.0-branch:
Avoid calling dump() in normal code
Merging r293787: ------------------------------------------------------------------------ r293787 | arphaman | 2017-02-01 09:37:28 -0800 (Wed, 01 Feb 2017) | 5 lines
Merging r293360: ------------------------------------------------------------------------ r293360 | gbiv | 2017-01-27 18:19:40 -0800 (Fri, 27 Jan 2017) | 11 lines
Merging r291963: ------------------------------------------------------------------------ r291963 | ericwf | 2017-01-13 14:11:40 -0800 (Fri, 13 Jan 2017) | 9 lines
Merging r293678: ------------------------------------------------------------------------ r293678 | ahatanak | 2017-01-31 11:53:32 -0800 (Tue, 31 Jan 2017) | 9 lines
