gn build: Merge r360540

llvm-svn: 360549

Author: nico

llvm/utils/gn/secondary/clang-tools-extra/clang-tidy/bugprone/BUILD.gn

@@ -51,6 +51,7 @@ static_library("bugprone") {
     "TooSmallLoopVariableCheck.cpp",
     "UndefinedMemoryManipulationCheck.cpp",
     "UndelegatedConstructorCheck.cpp",
+    "UnhandledSelfAssignmentCheck.cpp",
     "UnusedRaiiCheck.cpp",
     "UnusedReturnValueCheck.cpp",
     "UseAfterMoveCheck.cpp",