Add unique id to debug location for debug label use (work in progress.)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25096 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/MachineDebugInfo.cpp

@@ -50,6 +50,7 @@ namespace llvm {
   /// doFinalization - Tear down the debug state after completion of a module.
   ///
   bool MachineDebugInfo::doFinalization() {
+    
     return true;
   }