Log Message:
mingw-w64-*: Update to mingw-w64 to 8.0.0

* Update GCC to 10.2.0.
* Update Binutils to 2.35.1

Changelog:
v8.0.0: 2020-09-18

Notable changes:

    New Hyper-V headers and libraries by Biswapriyo Nath
    Many headers updated from Wine by Jacek Caban.
    ARM math improvements by Martin Storsjo
    floating point fixes by Liu Hao
    many *printf compatibility fixes by Liu Hao and Martin Storsjo
    massive Windows App Store API updates by Steve Lhomme
    winstorecompat library updates by Martin Storsjo
    __USE_MINGW_ANSI_STDIO now automatically enabled in C99 and C11 mode when \ 
not using UCRT by Pali Rohar
    wdm and ddk updates by Zebediah Figura
    UCRT for Windows Store Apps (-lucrtapp) by Martin Storsjo
    Audioclient and ActivateAudioInterfaceAsync API updates by Liu Hao
    DirectX SDKs are now always installed