In parse_svn_date() prepend the correct UTC offset to the timestamp
returned. This is the offset in effect at the commit time instead of
the offset in effect at calling time.
Signed-off-by: Urs Thuermann <urs@isnogud.escape.de> Reviewed-by: Eric Wong <e@80x24.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>