[PATCH v2] elf: Use dl-symbol-redir-ifunc.h instead _dl_strlen

[DJ Delorie]

Adhemerval Zanella Netto <adhemerval.zanella@linaro.org> writes:
> I think there is no need change it for s390x, gcc-12 (minimum support one)
> always inline strlen even for -march=z900 (arch5) [1].

I concur.  LGTM.
Reviewed-by: DJ Delorie <dj@redhat.com>