navit: bump SRCREV and add patch from debian to fix build with gcc-4.7.1

* COPYING was updated in
  http://navit.svn.sourceforge.net/viewvc/navit/trunk/navit/COPYING?r1=5023&r2=5022&pathrev=5023


  just 2 more files listed in GPLv2, rest is in LGPL

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>