Add copied Cartfile.resolved to gitignore
Add copied Cartfile.resolved to gitignore

Summary:
[`bootstrap.sh` copies `Cartfile.resolved` into the `Carthage` directory][1] as of [`eb28d74`][2]. This diff adds that copied file to `.gitignore`.

[1]: https://github.com/facebook/WebDriverAgent/blob/7ce95d21f990cf32fc623058d5cb74303edfb9e5/Scripts/bootstrap.sh#L50
[2]: https://github.com/facebook/WebDriverAgent/commit/eb28d747bcbd0e3432a84ccd0e528e902bd7cc61
Closes https://github.com/facebook/WebDriverAgent/pull/296

Differential Revision: D3906659

Pulled By: marekcirkos

fbshipit-source-id: b2e800a6f315b028969edc189ffe825fe6050acb

b1ueshad0w/WebDriverAgent,qa-dev/WebDriverAgent,b1ueshad0w/WebDriverAgent,b1ueshad0w/WebDriverAgent,PiranhaTeam/WebDriverAgent,riccoyu/WebDriverAgent,PiranhaTeam/WebDriverAgent,PiranhaTeam/WebDriverAgent,qa-dev/WebDriverAgent,drptbl/WebDriverAgent,drptbl/WebDriverAgent,Gogle/WebDriverAgent,ymin/WebDriverAgent,calabash/WebDriverAgent,ymin/WebDriverAgent,riccoyu/WebDriverAgent,PiranhaTeam/WebDriverAgent,riccoyu/WebDriverAgent,Gogle/WebDriverAgent,qa-dev/WebDriverAgent,ymin/WebDriverAgent,Gogle/WebDriverAgent,b1ueshad0w/WebDriverAgent,zenzhu/WebDriverAgent,riccoyu/WebDriverAgent,drptbl/WebDriverAgent,calabash/WebDriverAgent,PiranhaTeam/WebDriverAgent,Gogle/WebDriverAgent,qa-dev/WebDriverAgent,zenzhu/WebDriverAgent,ymin/WebDriverAgent,calabash/WebDriverAgent,zenzhu/WebDriverAgent