pull up r19371 from trunk

pull up r19371 from trunk

 r19371@cathode-dark-space:  kpkoch | 2007-04-01 14:42:18 -0400
 Target_Version: 1.6.1
 Ticket: 5490
 Tags: pullup

 Be smarter about cleaning the staging area.
 Clean output area if packaging.  (Will not clean if -nopackage specified.)

 Pull corebinaries from staging area instead of from target area.

 Don't sign before making zips.  Build products are only signed in the staging area before any packaging is done.  (Packaging products are signed when copied to the output area.)

 Previous change: Add relnotes.html to output area.

ticket: 5490

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-6@19387 dc483132-0cff-0310-8789-dd5450dbe970