Review requests: mingw-qt5-qtserialport, mingw-qt5-qtcharts, mingw-twaindsm

[Sandro Mani]

Hi

Another bunch of mingw packages:

* mingw-qt5-qtserialport: 
https://bugzilla.redhat.com/show_bug.cgi?id=1526479

* mingw-qt5-qtcharts: https://bugzilla.redhat.com/show_bug.cgi?id=1526480

* mingw-twaindsm: https://bugzilla.redhat.com/show_bug.cgi?id=1526481

Should be pretty straight forward. Happy to review in exchange.

Sandro