FYI: kdelibs4support & Qt 5.4

[Harald Sitter]

kdelibs4support when built with Qt<=5.3 will extern an exported symbol
that is not part of the public API. this symbol was retracted in 5.4
so please make sure that you rebuild kdelibs4support when you land
5.4.

of course to be on the save side and make the most out of 5.4 you'd
want to rebuild of all frameworks as there are various bug fixes
depending on 5.4 that have been ifdefed apparently.

> ./src/kdecore/kdebug.cpp:extern Q_CORE_EXPORT QString qMessageFormatString(QtMsgType type, const QMessageLogContext & context,

HS