Fix build after cherry pick eb50d13bb5e442b4771c8185e5504b6371409c1d.
Fix build after cherry pick eb50d13bb5e442b4771c8185e5504b6371409c1d.

<rdar://problem/26068360>

apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,apple/swift-lldb