[MacPorts] #61251: Update mingw-gcc to 10.2.0

[MacPorts]

#61251: Update mingw-gcc to 10.2.0
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 Reporter:  Gcenx   |      Owner:  mojca
     Type:  update  |     Status:  assigned
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  x86_64-w64-mingw32-gcc
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 I’ve opened pull-requests for mingw-w64 and mingw-binutils ports along
 with crossgcc to includes gcc 10.2.0

 I’ve quickly attempted this but the build eventually fails with a log
 that’s 60+ MB, didn’t have time to open a draft before heading to work

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Ticket URL: <https://trac.macports.org/ticket/61251>
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