version bump

Change-Id: I3dd7939a388f67a5addb4313032f182e9672caf1
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>

qtcreator.pri

 !isEmpty(QTCREATOR_PRI_INCLUDED):error("qtcreator.pri already included")
 QTCREATOR_PRI_INCLUDED = 1
 
-QTCREATOR_VERSION = 2.4.81
+QTCREATOR_VERSION = 2.5.81
 
 defineReplace(cleanPath) {
     win32:1 ~= s|\\\\|/|g