[Swift] Update Swift docker image with Swift 4.2.2 and key server

library/swift

@@ -8,7 +8,7 @@ GitRepo: https://github.com/apple/swift-docker.git
 
 
 Tags: 4.2.2, 4.2.1, 4.2, 4, latest
-GitCommit: 1ad9455c1c0e5eec3298abb51316007fcc2c1c50
+GitCommit: c5dd5e013de66da930cf1b9804797dbae11e8f9c
 Directory: 4.2/ubuntu/16.04
 
 Tags: 4.1.3, 4.1