bug#24737: `guix lint` should not check patch-file-names on inherited sources

[Ludovic Courtès]

Marius Bakke <address@hidden> skribis:

> After patching 'notmuch', `guix lint -c patch-file-names` does not pass
> for 'python-notmuch' which inherits the source from 'notmuch'.

I agree but that’s not quite possible: the “inheritance” relation (which
is really just a copy of a record) is not known at run time.

So we’d need another trick to guess whether a patch is coming from
elsewhere and should consequently be ignored by ‘lint’.

Thanks,
Ludo’.