Version bump for after the RC.

Change-Id: I050e91370efd5c7fc5e6423126d5678743ed8002

qtcreator.pri

 !isEmpty(QTCREATOR_PRI_INCLUDED):error("qtcreator.pri already included")
 QTCREATOR_PRI_INCLUDED = 1
 
-QTCREATOR_VERSION = 2.4.83
+QTCREATOR_VERSION = 2.4.84
 
 defineReplace(cleanPath) {
     win32:1 ~= s|\\\\|/|g