[gn build] Port 81de861

Author: llvmgnsyncbot

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

@@ -57,6 +57,7 @@ static_library("readability") {
     "RedundantSmartptrGetCheck.cpp",
     "RedundantStringCStrCheck.cpp",
     "RedundantStringInitCheck.cpp",
+    "RedundantTypenameCheck.cpp",
     "ReferenceToConstructedTemporaryCheck.cpp",
     "SimplifyBooleanExprCheck.cpp",
     "SimplifySubscriptExprCheck.cpp",