> guix: document when certain guix patches can be dropped
Note that we don't support powerpc, and the glibc-2.28-fcommon patch mentions that it specifically fixes an issue for this platform, but the patch is applied by Core to all builds, so it is best to keep it.
> guix: remove redundant glibc patches
>
> These should only be relevant for a glibc that is built as part of a
> Guix system, and should not be required for a glibc that is just being
> built to compile our binaries against. A x86_64 linux bitcoind produced
> with Guix using master vs this change has no difference. i.e:
This is a backport of core#27668 and core#27670
Depends on D15330