Fixes #970: Set SWIFT_REFLECTION_METADATA_LEVEL build settings to "none" as temporary workaround for Swift compiler issue (https://bugs.swift.org/browse/SR-3081).
Fixes #970: Set SWIFT_REFLECTION_METADATA_LEVEL build settings to "none" as temporary workaround for Swift compiler issue (https://bugs.swift.org/browse/SR-3081).

tottakai/RxSwift,cfraz89/RxSwift,shiratsu/RxSwift,cfraz89/RxSwift,ReactiveX/RxSwift,kzaher/RxSwift,cfraz89/RxSwift,KyoheiG3/RxSwift,kzaher/RxSwift,tottakai/RxSwift,shiratsu/RxSwift,KyoheiG3/RxSwift,cfraz89/RxSwift,ReactiveX/RxSwift,kzaher/RxSwift,kzaher/RxSwift,tottakai/RxSwift,shiratsu/RxSwift,ReactiveX/RxSwift,KyoheiG3/RxSwift