stdlib/Dictionary: add tests for trapping during bridging a Dictionary whose KeyType is not NSCopyable
stdlib/Dictionary: add tests for trapping during bridging a Dictionary
whose KeyType is not NSCopyable

Swift SVN r18259

apple/swift-corelibs-foundation,apple/swift-corelibs-foundation,apple/swift-corelibs-foundation,apple/swift-corelibs-foundation,apple/swift-corelibs-foundation