Added Carthage/Build to .gitignore
Added Carthage/Build to .gitignore

When using the option `--use-submodules` with Carthage, the `Carthage/Build` directory shows in the submodule after `carthage build` making the submodule dirty.
pardel/Reachability.swift,pardel/Reachability.swift,ashleymills/Reachability.swift,ashleymills/Reachability.swift