talloc: version 2.1.2

talloc: version 2.1.2

Changes:
- Allow destructors to reparent the object
- Allow destructors to remove itself
- Build improvements

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
(cherry picked from commit 7bef5e4f0e5ff4a4187f3d63e51a1725ff32b771)

BUG: https://bugzilla.samba.org/show_bug.cgi?id=11144
Memory leak in SMB2 notify handling.

Autobuild-User(v4-1-test): Karolin Seeger <kseeger@samba.org>
Autobuild-Date(v4-1-test): Mon Mar 16 00:25:52 CET 2015 on sn-devel-104