[SR-9497] [Source Compat] Introducing Result to the standard library breaks source

[moiseev]

Previous ID	SR-9497
Radar	None
Original Reporter	@moiseev
Type	Task

Additional Detail from JIRA

Votes	0
Component/s	Standard Library
Labels	Task, SourceCompatibility
Assignee	None
Priority	Medium

md5: 6c7f8cb52771c832dca8579f75d1c20b

Issue Description:

Failures:
FAIL: Alamofire, 4.0, a5cd9e, iOS Example, generic/platform=iOS
FAIL: Kickstarter-ReactiveExtensions, 4.0, 6b7887, ReactiveExtensions-TestHelpers-iOS, generic/platform=iOS
FAIL: Kickstarter-ReactiveExtensions, 4.0, 6b7887, ReactiveExtensions-iOS, generic/platform=iOS
FAIL: ReactiveCocoa, 4.0, 72dd20, ReactiveCocoa-watchOS, generic/platform=watchOS
FAIL: ReactiveCocoa, 4.0, 72dd20, ReactiveCocoa-tvOS, generic/platform=tvOS
FAIL: ReactiveCocoa, 4.0, 72dd20, ReactiveCocoa-iOS, generic/platform=iOS
FAIL: ReactiveCocoa, 4.0, 72dd20, ReactiveCocoa-macOS, generic/platform=macOS
FAIL: ReactiveSwift, 4.0, 46fb4d, ReactiveSwift-watchOS, generic/platform=watchOS
FAIL: ReactiveSwift, 4.0, 46fb4d, ReactiveSwift-tvOS, generic/platform=tvOS
FAIL: ReactiveSwift, 4.0, 46fb4d, ReactiveSwift-iOS, generic/platform=iOS
FAIL: ReactiveSwift, 4.0, 46fb4d, ReactiveSwift-macOS, generic/platform=macOS