pidl/ws: avoid trailing tabs

pidl/ws: avoid trailing tabs

Port Wireshark commit 4f04a3c

Author: Stefan Metzmacher <metze@samba.org>
Date:   Thu Oct 29 08:32:52 2015 +0100

    tools/pidl: avoid trailing tabs

    Change-Id: I293dd6f2d7ff3b0e27bc3cc49e69977604f12260
    Signed-off-by: Stefan Metzmacher <metze@samba.org>
    Reviewed-on: https://code.wireshark.org/review/11433
    Reviewed-by: Anders Broman <a.broman58@gmail.com>
Signed-off-by: Aurelien Aptel <aaptel@suse.com>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>