[mythtv] Building myth against qt5.8

[Roger James]

I am trying to download a minimal set of qt5.8 source submodules to build 
Mythtv against. The full download is massive. I have grabbed qtBase and 
qtscript so far. I am missing the sources to build  libQt5WebKit, 
libQt5WebKitWidgets, libQt5Quick and libQt5Qml. Does anyone know which qt5 
source submodules are these libraries are built from? I do not to trawl 
through the whole list, and there does not seem a list of submodules 
contents anywhere.

Cheers

Roger