[PATCH 16/23] [AARCH64] Make lp64 and ilp32 directories.

[Joseph Myers]

<https://sourceware.org/ml/libc-alpha/2016-06/msg00789.html> and 
<https://sourceware.org/ml/libc-alpha/2014-10/msg00640.html> still apply.

It's clear this won't be ready to go in within the next two days, so use 
GLIBC_2.25 as symbol version, and be prepared to change it to GLIBC_2.26 
or later if it doesn't get in by the end of the year.

-- 
Joseph S. Myers
joseph@codesourcery.com