[patch] ps -Z fixes again

[Yuichi Nakamura]

Hi. 
We submitted patch to fix problem "ps -Z can not be used when ENABLE_DESKTOP is enabled".
http://www.busybox.net/lists/busybox/2007-May/027382.html

As a result of discussion in above thread, 
We added PSSCAN_CONTEXT flag to libb.h, 
and added logic to obtain SELinux attribute to procps_scan. 
We  also modified ps.c to use procps_scan.
http://www.busybox.net/lists/busybox/2007-May/027511.html

We would like to submit patch again.
Please review attached 3.patch, it is a patch to latest svn.

Regards,
-- 
Yuichi Nakamura
Hitachi Software Engineering Co., Ltd.
Japan SELinux Users Group(JSELUG): http://www.selinux.gr.jp/
SELinux Policy Editor: http://seedit.sourceforge.net/

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