Patch to fix build with Qt 5.5, taken from upstream:
   https://github.com/lxde/liblxqt/commit/7303ea207de0771d6f450a31ec4a1ce69202869b

diff -u -r liblxqt-0.9.0.orig/lxqtnotification.h liblxqt-0.9.0/lxqtnotification.h
--- liblxqt-0.9.0.orig/lxqtnotification.h	2015-07-27 22:49:05.365166482 +0200
+++ liblxqt-0.9.0/lxqtnotification.h	2015-07-27 22:49:36.897606619 +0200
@@ -25,6 +25,7 @@
 #ifndef LXQTNOTIFICATION_H
 #define LXQTNOTIFICATION_H
 
+#include <QObject>
 #include <QStringList>
 #include "lxqtglobals.h"
 
