Fix Swift 3.1 warnings from G4ShareSpy, ShareClient#2

bharat merged 2 commits intobharat:dev-frameworks-swift3.1bharat/Loop:dev-frameworks-swift3.1from

mddub:g4-and-share-deps-to-swift-3-1mddub/Loop:g4-and-share-deps-to-swift-3-1Copy head branch name to clipboard