Debugger: Work around race when running from command line

If the project was not parsed yet while the debugger is invoked,
activeRunConfiguration is still null, so the debugger doesn't start.

Task-number: QTCREATORBUG-18551
Change-Id: I02d77fa8fb1b2a3673da5cbf28ea36156498918c
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/debugger/debuggerruncontrol.cpp

@@ -623,7 +623,7 @@ RunConfiguration *dummyRunConfigForKit(ProjectExplorer::Kit *kit)
     QTC_ASSERT(kit, return nullptr); // Caller needs to look for a suitable kit.
     Project *project = SessionManager::startupProject();
     Target *target = project ? project->target(kit) : nullptr;
-    if (!target) {
+    if (!target || !target->activeRunConfiguration()) {
         project = new DummyProject;
         target = project->createTarget(kit);
     }