sstate-cache-management.sh: don't remove all packagedata sstate archives
* packagedata task was introduced in:
commit 6107ee294afde395e39d084c33e8e94013c625a9
Author: Richard Purdie <richard.purdie@linuxfoundation.org>
Date: Wed Jan 23 14:27:33 2013 +0000
Subject: Split do_packagedata task from do_package
* rm_by_stamps wasn't using do_packagedata or do_packagedata_setscene
stamp files to find which sstate archives to keep, so it was removing
all of them
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>