Updated mediawiki/extensions
Project: mediawiki/extensions/SwiftMailer  6e4f9807bed519b11610a6d8d11a31f92e7e791a

Changed the SwiftMailer repo location from Wiki-repo to defualt

Currently, swiftmailer takes in the source from our local clone
of the repo, which is not necessary.

Change-Id: Id0af9fd794ddbacdaadefd48a72713a7d59268b5