Update to 2.5.2 and use new URLs.

Signed-off-by: Andrew John Hughes <gnu_andrew@member.fsf.org>
Use correct changesets and fix AArch64 URL.

Signed-off-by: Andrew Hughes <gnu.andrew@redhat.com>
Adapt to work on RHEL 7.

Signed-off-by: Andrew Hughes <gnu.andrew@redhat.com>
Merge branch '2.5'