some progress on AIX clientupdate problem

[Jay Brislin]

I replaced the AIX tar executable with a version of GNU tar and the clientupdate was successful.
Since I can't really do that on our other AIX systems I just added the PATH to the GNU tar first in the hobbit 
.profile but unfortunately that doesn't work.
If we could redefine where clientupdate gets the "tar" executable from I think this problem would be solved.
-- 
Jay