QNX: Do not set application arguments to pdebug

This way one can give application arguments to the application to be
debugged on QNX.

pdebug doesn't need the application arguments to be forwarded.

Change-Id: I76d1bf0dcd9c8fd085245142239e427d9dcb711e
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: Cristian Adam <cristian.adam@qt.io>

src/plugins/qnx/qnxdebugsupport.cpp

@@ -116,7 +116,6 @@ public:
                 arguments.append(QmlDebug::qmlDebugTcpArguments(QmlDebug::QmlDebuggerServices,
                                                                 portsGatherer->qmlServer()));
             }
-            arguments.append(ProcessArgs::splitArgs(r.commandLineArguments));
             r.commandLineArguments = ProcessArgs::joinArgs(arguments);
 
             doStart(r, runControl->device());