Debugger: Stop on first line when starting PdbEngine

This seems to be the expected behavior of PDB users.

Change-Id: Iaa9ca5e173e02d423c1a96a5f553bde0826db19c
Reviewed-by: Christian Stenger <christian.stenger@theqtcompany.com>

src/plugins/debugger/pdb/pdbengine.cpp

@@ -169,10 +169,7 @@ void PdbEngine::runEngine()
     showStatusMessage(tr("Running requested..."), 5000);
     attemptBreakpointSynchronization();
     notifyEngineRunAndInferiorStopOk();
-    if (runParameters().breakOnMain)
     updateAll();
-    else
-        continueInferior();
 }
 
 void PdbEngine::interruptInferior()