[gn build] Port 7a4e897

Author: aeubanks

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

@@ -13,6 +13,7 @@ static_library("utils") {
   sources = [
     "ASTUtils.cpp",
     "Aliasing.cpp",
+    "BracesAroundStatement.cpp",
     "DeclRefExprUtils.cpp",
     "DesignatedInitializers.cpp",
     "ExceptionAnalyzer.cpp",