fix debug application with terminal different to default (xterm)

The setting, which terminal, to start an application in debug mode from, was ignored, since the QSetting was just not set.

Reviewed-by:ossi

src/plugins/debugger/gdb/gdbengine.cpp

@@ -121,6 +121,9 @@ GdbEngine::GdbEngine(DebuggerManager *parent) :
     q = parent;
     qq = parent->engineInterface();
     m_stubProc.setMode(Core::Utils::ConsoleProcess::Debug);
+#ifdef Q_OS_UNIX
+    m_stubProc.setSettings(Core::ICore::instance()->settings());
+#endif
     initializeVariables();
     initializeConnections();
 }