[Bug target/77676] powerpc64 and powerpc64le stage2 bootstrap fail

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77676

--- Comment #12 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> The patch should resolve all the issues discussed in this bug. 
> I don't have access to Darwin so I'd appreciate your help validating it there.

The patch restores bootstrap on darwin. Thanks.