gensync generated a sync.db file with PKGINFO syntax, this is not quite what
pacman expects.

Also the file was only added to the Server path:
	root/var/pub/sync/sync.db
but it was not available in the normal sync db path:
	root/var/lib/pacman/sync/sync.db

Change gensync() to generate var/lib/pacman/sync/sync.db and then copy it to
var/pub/sync/sync.db (this is used by sync200 -Sy test).

Signed-off-by: Dan McGee <dan@archlinux.org>