Debugger: Move start dependency on PortsGatherer to GdbServerRunner

It's always needed and GdbServerRunner knows the PortsGatherer.

This also makes the setup more similar to the QNX PDebugRunner setup.

Change-Id: I5863d2c77cd5c92d0f25682d655c9901b8939c30
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/debugger/debuggerplugin.cpp

@@ -1993,7 +1993,6 @@ public:
 
         auto gdbServer = new GdbServerRunner(runControl, portsGatherer());
         gdbServer->setUseMulti(false);
-        gdbServer->addStartDependency(portsGatherer());
         gdbServer->setDevice(device);
         gdbServer->setAttachPid(ProcessHandle(pid));
 

src/plugins/debugger/debuggerruncontrol.cpp

@@ -1009,6 +1009,7 @@ GdbServerRunner::GdbServerRunner(RunControl *runControl, GdbServerPortsGatherer
     setDisplayName("GdbServerRunner");
     if (runControl->runnable().is<StandardRunnable>())
         m_runnable = runControl->runnable().as<StandardRunnable>();
+    addStartDependency(m_portsGatherer);
 }
 
 GdbServerRunner::~GdbServerRunner()

src/plugins/remotelinux/remotelinuxdebugsupport.cpp

@@ -43,7 +43,6 @@ LinuxDeviceDebugSupport::LinuxDeviceDebugSupport(RunControl *runControl)
     addQmlServerInferiorCommandLineArgumentIfNeeded();
 
     auto gdbServer = new GdbServerRunner(runControl, portsGatherer());
-    gdbServer->addStartDependency(portsGatherer());
 
     addStartDependency(gdbServer);