Mac M1 chip agbcc build error

[tkolarik]

This was an error on the main branch of agbcc as well, though i believe it was fixed there.

`ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

make: *** [cc1] Error 1

mv: rename gcc_arm/cc1 to agbcc_arm: No such file or directory`

[jiangzhengwenjz]

As pret/agbcc#52 has been merged, is this resolved?

EDIT: I probably didn't make it clear. I mean now, from the pull request it seems people can build pret/agbcc with Mac M1 and my fork contains every commit from there.