Source Maps on the 1.x series reference an unprovided source

[terencehonles]

Source Maps such as the one on 1.10.2 reference jquery.js as jquery-1.10.2.js but provide it as jquery.js (this seems to be correct in the 2.x release though)

[RobLoach]

If we roll a pull request for it, then we can merge it in easily.