Merge remote-tracking branch 'origin/swift-4.0-branch' into stable
* origin/swift-4.0-branch:
Merging r291955: ------------------------------------------------------------------------ r291955 | rsmith | 2017-01-13 12:46:54 -0800 (Fri, 13 Jan 2017) | 3 lines
Merging r292119: ------------------------------------------------------------------------ r292119 | joerg | 2017-01-16 15:07:24 +0100 (Mo, 16. Jan 2017) | 3 Zeilen
Merging r292247: ------------------------------------------------------------------------ r292247 | jbcoe | 2017-01-17 12:03:54 -0800 (Tue, 17 Jan 2017) | 14 lines
Merging r292183: ------------------------------------------------------------------------ r292183 | rsmith | 2017-01-16 18:14:37 -0800 (Mon, 16 Jan 2017) | 14 lines
Merging r292052: ------------------------------------------------------------------------ r292052 | akirtzidis | 2017-01-14 22:11:04 -0800 (Sat, 14 Jan 2017) | 1 line
Merging r292032: ------------------------------------------------------------------------ r292032 | yrnkrn | 2017-01-14 13:12:08 -0800 (Sat, 14 Jan 2017) | 4 lines
