Debugger: Add signals to DebuggerItemManager

Change-Id: Icbd14a683d1a5ec53aa2d2337d43a86c26bccac9
Reviewed-by: hjk <hjk121@nokiamail.com>

src/plugins/debugger/debuggeritem.h

@@ -82,6 +82,8 @@ public:
 
     QStringList abiNames() const;
 
+    bool operator==(const DebuggerItem &other) const;
+
 private:
     QVariant m_id;
     QString m_displayName;