Use llvm::stable_sort. NFC

llvm-svn: 358897
diff --git a/llvm/tools/llvm-readobj/MachODumper.cpp b/llvm/tools/llvm-readobj/MachODumper.cpp
index bc9a72b..5e82f1c 100644
--- a/llvm/tools/llvm-readobj/MachODumper.cpp
+++ b/llvm/tools/llvm-readobj/MachODumper.cpp
@@ -694,7 +694,7 @@
     }
   }
 
-  std::stable_sort(Libs.begin(), Libs.end());
+  llvm::stable_sort(Libs);
 
   for (const auto &L : Libs) {
     outs() << "  " << L << "\n";