Commited to git

From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Subject: [PATCH] hurd: Make libc able to call pthread stubs

* sysdeps/mach/hurd/bits/libc-lock.h [_LIBC]: Include
<bits/libc-lockP.h>

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>