Fix lupdate-warning in qqmlrewrite.cpp.
Fix lupdate-warning in qqmlrewrite.cpp.

Class 'QQmlRewrite' lacks Q_OBJECT macro.

Replace global-static strings by message functions.

Change-Id: I67a6fbe67575533d3ce5750d72c9d7eff06e7efa
Reviewed-by: Alan Alpert (Personal) <88b56286e35a5224392cc092099688d403c4217b@gmail.com>

crobertd/qtdeclarative,qmlc/qtdeclarative,crobertd/qtdeclarative,matthewvogt/qtdeclarative,corngood/qtdeclarative,jfaust/qtdeclarative,matthewvogt/qtdeclarative,matthewvogt/qtdeclarative,jfaust/qtdeclarative,mgrunditz/qtdeclarative-2d,corngood/qtdeclarative,matthewvogt/qtdeclarative,corngood/qtdeclarative,jfaust/qtdeclarative,qmlc/qtdeclarative,mgrunditz/qtdeclarative-2d,corngood/qtdeclarative,matthewvogt/qtdeclarative,corngood/qtdeclarative,crobertd/qtdeclarative,matthewvogt/qtdeclarative,mgrunditz/qtdeclarative-2d,qmlc/qtdeclarative,crobertd/qtdeclarative,mgrunditz/qtdeclarative-2d,qmlc/qtdeclarative,matthewvogt/qtdeclarative,qmlc/qtdeclarative,qmlc/qtdeclarative,matthewvogt/qtdeclarative,crobertd/qtdeclarative,mgrunditz/qtdeclarative-2d,mgrunditz/qtdeclarative-2d,jfaust/qtdeclarative,jfaust/qtdeclarative,crobertd/qtdeclarative,corngood/qtdeclarative,qmlc/qtdeclarative,corngood/qtdeclarative,crobertd/qtdeclarative,jfaust/qtdeclarative,mgrunditz/qtdeclarative-2d,jfaust/qtdeclarative,qmlc/qtdeclarative