cocoa: Add NSRunningApplication.runningApplicationsWithBundleIdentifier#727

ethanuppal wants to merge 1 commit intoservo:mainservo/core-foundation-rs:mainfrom

ethanuppal:NSRunningApplication.runningApplicationsWithBundleIdentifierethanuppal/core-foundation-rs:NSRunningApplication.runningApplicationsWithBundleIdentifierCopy head branch name to clipboard