[Bug sanitizer/79341] Many Asan tests fail on s390

[fw at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79341

--- Comment #20 from Florian Weimer <fw at gcc dot gnu.org> ---
(In reply to Andreas Krebbel from comment #19)

> As a debugging tool I think asan is a special case also regarding ABI
> compatibility. We probably do not want to export the internal symbol and
> make it part of the ABI because of a single user.

We have users in GCC and LLVM already, and both projects have many downstream
forks.  This means that it's going to be difficult to adjust all users as part
of a system glibc update.

GLIBC_PRIVATE is internal to glibc.  Please do not depend on these symbols. 
They can change or go away at any time.  For example, the prototype of
__libc_res_nsearch changed during a security update.