avr-gcc @11.2.0_1: Build failure on Apple Silicon (needs patch-arm64.diff)

[VinDuv]

The avr-gcc build fails with the following error:

:info:build Undefined symbols for architecture arm64:
:info:build   "_host_hooks", referenced from:
:info:build       gt_pch_save(__sFILE*) in libbackend.a(ggc-common.o)
:info:build       gt_pch_restore(__sFILE*) in libbackend.a(ggc-common.o)
:info:build       toplev::main(int, char**) in libbackend.a(toplev.o)
:info:build ld: symbol(s) not found for architecture arm64

I found that other gcc cross compiler ports, such as x86_64-w64-mingw32-gcc, had a patch-arm64.diff patch. Adding that patch to avr-gcc (​https://github.com/macports/macports-ports/blame/master/cross/x86_64-w64-mingw32-gcc/Portfile#L30) fixed the build. avr-gcc seems to work fine afterwards.