[gn build] Port 87d0aed

Author: llvmgnsyncbot

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

@@ -49,6 +49,7 @@ static_library("readability") {
     "RedundantSmartptrGetCheck.cpp",
     "RedundantStringCStrCheck.cpp",
     "RedundantStringInitCheck.cpp",
+    "ReferenceToConstructedTemporaryCheck.cpp",
     "SimplifyBooleanExprCheck.cpp",
     "SimplifySubscriptExprCheck.cpp",
     "StaticAccessedThroughInstanceCheck.cpp",