Update libqmatrixclient.

This update brings some changes, and more debugging is needed.

src/controller.h

@@ -95,6 +95,7 @@ class Controller : public QObject {
   void errorOccured();
 
  public slots:
+  void postMessage(Room* room, const QString& type, const QString& text);
   void postFile(Room* room, const QUrl& localFile, const QUrl& mxcUrl);
   QString getMIME(const QUrl& fileUrl) const;
   void forgetRoom(const QString& roomID);