Refactor SetupAutomocTarget() so it can be run after creating the target

This makes it easier to move it from InitialPass() to some other
location, e.g. FinalPass() or something else.

Alex

Source/cmAddExecutableCommand.cxx

@@ -126,14 +126,6 @@ bool cmAddExecutableCommand
     }
 
   std::vector<std::string> srclists(s, args.end());
-  cmQtAutomoc* automoc = 0;
-  if ( doAutomoc )
-    {
-    automoc = new cmQtAutomoc;
-    automoc->SetupAutomocTarget(this->Makefile, exename.c_str(), srclists);
-    }
-
-
   cmTarget* tgt = this->Makefile->AddExecutable(exename.c_str(), srclists,
                                                 excludeFromAll);
   if ( use_win32 )
@@ -145,11 +137,10 @@ bool cmAddExecutableCommand
     tgt->SetProperty("MACOSX_BUNDLE", "ON");
     }
 
-  if ( automoc )
+  if ( doAutomoc )
     {
-    automoc->AddTargetDependency(this->Makefile, tgt);
-    delete automoc;
-    automoc = 0;
+    cmQtAutomoc automoc;
+    automoc.SetupAutomocTarget(tgt);
     }
 
   return true;