d3dcompiler_43 and d3dcompiler_46 dlls included in installer

EDIT:

After a short discussion with Kai Köhne I'm changing this bug report to the inclusion of d3dcompiler_43.dll and d3dcompiler_46.dll in the packaging of
the vs2010 and vs2012 installer respectively

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Old:

All the mingw compilers go as far as d3dcompiler_43.lib.
Windows 8 only has _46 onwards so qt probably should set 46 as the min version used when using angle.
This task is not something just solved within the qt project itself but in the mingw compiler so I will raise the issue with the guys over at mingw64.

but

QT should choose a mingw compiler with the latest d3dcompiler libs which is why I have created this task.

Does anyone know if your allowed distribute the Microsoft dll's?
It might be a good idea to include it in the angle third party folder to copy into qtbase when angle is used for backwards compatibility with windows 7 vista etc.