[swift-dev] [Swift 2.2] Patches for __FILE__ symbols

[Chris Lattner]

Please consider merging these patches into Swift 2.2, this adds support for the #file syntax, and produces deprecation warnings for __FILE__.

d522cd4270290e73ff4c957c252d4f2e8365b5a2
8dedfb31e3c8c60039efb0c038a355d2e8f33792
0619e57a61f27f721e273ab6f808ac81011aeb2c
87681ef0a122c1395aac8f89727575ca95265b6b

Here are the github links:
https://github.com/apple/swift/commit/d522cd4270290e73ff4c957c252d4f2e8365b5a2
https://github.com/apple/swift/commit/8dedfb31e3c8c60039efb0c038a355d2e8f33792
https://github.com/apple/swift/commit/0619e57a61f27f721e273ab6f808ac81011aeb2c
http://github.com/apple/swift/commit/87681ef0a122c1395aac8f89727575ca95265b6b

-Chris