Debugger: Make language to debug (QML/CPP) explicit

Make the choice of language part of the DebuggerStartParameters,
instead of deriving it indirectly from the current project. This
prevents e.g. the QmlCppEngine to be used when loading core files.

Change-Id: I9d1c9ab318ba789abe3a6ea0478ebda71857e793
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/debugger/debuggerconstants.h

@@ -130,7 +130,6 @@ enum DebuggerStartMode
     AttachToRemoteServer,  // Attach to a running gdbserver
     AttachToRemoteProcess, // Attach to a running remote process
     StartRemoteProcess,    // Start and attach to a remote process
-    AttachToQmlPort,       // Attach to QML debugging port
     StartRemoteGdb,        // Start gdb itself remotely
     StartRemoteEngine      // Start ipc guest engine on other machine
 };