[gn build] Port 79cc728

Author: llvmgnsyncbot

llvm/utils/gn/secondary/lld/Common/BUILD.gn

@@ -43,6 +43,7 @@ static_library("Common") {
     "Strings.cpp",
     "TargetOptionsCommandFlags.cpp",
     "Timer.cpp",
+    "Utils.cpp",
     "Version.cpp",
   ]
 }