add the new thread model: MCF

[niXman]

hello,

recently the MinGW-Builds projects added the new thread model, called mcf.
previously, the project supported only two threads models: posix and win32.

is it possible to extend the installer to support the new mcf thread model?

this would be very cool for users, and I'm sure many users will be grateful to you!

but keep in mind that there are only two builds with mcf thread model:
https://github.com/niXman/mingw-builds-binaries/releases/download/13.2.0-rt_v11-rev1/i686-13.2.0-release-mcf-dwarf-ucrt-rt_v11-rev1.7z
https://github.com/niXman/mingw-builds-binaries/releases/download/13.2.0-rt_v11-rev1/x86_64-13.2.0-release-mcf-seh-ucrt-rt_v11-rev1.7z

many thanks!