<pkg>-rsync: Reincluding core files and folders, which got kicked out by --cvs-exclude option.

The --cvs-exclude option also excludes 'core', which when rsyncing
e.g. a linux tree is less than optimal..

Signed-off-by: Andreas Naumann <anaumann@ultratronik.de>
Acked-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Tested-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>