2012-05-10  Samuel Thibault  <samuel.thibault@ens-lyon.org>

        * sysdeps/generic/ldsodefs.h [LIBC_STACK_END_NOT_RELRO]
        (__libc_stack_end): Do not use attribute_relro.
        * sysdeps/mach/hurd/dl-sysdep.h (LIBC_STACK_END_NOT_RELRO): Define.
        * sysdeps/mach/hurd/i386/init-first.c (init): Update __libc_stack_end
	to libthread-provided value.
        * sysdeps/mach/hurd/dl-sysdep.c (__libc_stack_end): Do not use
        attribute_relro.