Debugger[Trk]: Added TCF experimental adapter.

Added adapter to work with TCF over WLAN.
Factor out common code for Symbian from TrkAdapter.
Improve message logging in TrkGdbAdapter, some cleanup.
Added new TcfTrkGdbAdapter based on TcfTrkDevice
in symbianutils based on JSON, using QTcpSocket.
To be started via special @tcf@ argument.
Rubber-stamped-by: hjk

src/plugins/debugger/debuggerrunner.cpp

@@ -338,6 +338,10 @@ void DebuggerRunControl::createEngine(const DebuggerStartParameters &sp)
     else
         engineType = engineForToolChain(sp.toolChainType);
 
+    // Fixme: 1 of 3 testing hacks.
+    if (sp.processArgs.size() >= 5 && sp.processArgs.at(0) == _("@tcf@"))
+        engineType = GdbEngineType;
+
     if (engineType == NoEngineType
             && sp.startMode != AttachToRemote
             && !sp.executable.isEmpty())