Merge upstream llvm.org r211526 into dev-tfiala-native-protocol-linux-x86_64

Conflicts:
	lldb.xcodeproj/project.pbxproj
Merge upstream llvm.org r211536 into dev-tfiala-native-protocol-linux-x86_64
Merge upstream llvm.org r211549 into dev-tfiala-native-protocol-linux-x86_64
Merge MBP changes from last night into dev-tfiala-native-protocol-linux-x86_64 on MP.