Debugger: Automatically adapt to the languages the running engine supports

We used to get the layout only from the current/last run configuration. However,
this fails for engines started by other means (Debug->Start Debugging submenu).

Change-Id: I87e12457c7cd68a326ac1827298a3542e149199b
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/debugger/debuggermainwindow.h

@@ -62,6 +62,7 @@ public:
 
     // Active languages to be debugged.
     DebuggerLanguages activeDebugLanguages() const;
+    void setEngineDebugLanguages(DebuggerLanguages languages);
 
     // Called when all dependent plugins have loaded.
     void initialize();