[qmf] Update to upstream version 4.0.3.1
Squashed 'qmf/' changes from 8bcfbaa..d0754cc

d0754cc Convert QByteArray to QString using QString::fromLatin1().

git-subtree-dir: qmf
git-subtree-split: d0754cc681e9782aa36e3a5b9560cedcdf91b05b
Merge commit '3288d9ca93e8aadfc93df92b7303cc49e217567a'