sawman: bumping version to 1.6.3

After switching directfb to 1.6.3 sawman must also be bumped to the
current version because the old version can't be builded with newer
libs and headers from directfb.

Signed-off-by: Carsten Schoenert <c.schoenert@gmail.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>