Allow qmake to compile using it's .pro file.
Allow qmake to compile using it's .pro file.

This fixes a problem where qmake would not compile when it was built
from it's .pro file because this method uses the pre-compiled header.
This header was causing a compile error in qlocale.cpp because
qtextstream.h was included and this includes qlocale.h. The problem in
qlocale.cpp was that it uses a define called QLOCALE_CPP to enable
extra functions in the class declaration, but the pre-compiled header
was preventing the qlocale.h from being re-processed and therefore the
function was never compiled in.

Reviewed-by: Marius Storm-Olsen

igor-sfdc/qt-wk,KDE/qt,RLovelett/qt,igor-sfdc/qt-wk,RLovelett/qt,pruiz/wkhtmltopdf-qt,KDE/qt,radekp/qt,KDE/qt,pruiz/wkhtmltopdf-qt,pruiz/wkhtmltopdf-qt,RLovelett/qt,pruiz/wkhtmltopdf-qt,pruiz/wkhtmltopdf-qt,radekp/qt,RLovelett/qt,pruiz/wkhtmltopdf-qt,igor-sfdc/qt-wk,pruiz/wkhtmltopdf-qt,RLovelett/qt,radekp/qt,igor-sfdc/qt-wk,RLovelett/qt,pruiz/wkhtmltopdf-qt,KDE/qt,radekp/qt,radekp/qt,igor-sfdc/qt-wk,pruiz/wkhtmltopdf-qt,igor-sfdc/qt-wk,KDE/qt,KDE/qt,RLovelett/qt,pruiz/wkhtmltopdf-qt,igor-sfdc/qt-wk,igor-sfdc/qt-wk,radekp/qt,KDE/qt,radekp/qt,radekp/qt,RLovelett/qt,igor-sfdc/qt-wk,RLovelett/qt,radekp/qt,RLovelett/qt,pruiz/wkhtmltopdf-qt,igor-sfdc/qt-wk,igor-sfdc/qt-wk,radekp/qt,RLovelett/qt,KDE/qt