BUG: tests/scripts/defines.sh has bad DIFF line

[Andrew Diederich <andrew@NETdelivery.com>]

I've spent some time with the test scripts in tracking down my problems.  It
looks like the tests/scripts/defines.sh has an incorrect diff line.  I found
this when running 'make test' on 2.1.4, and it failed on test001-slapadd
(diff: illegal option --u)

diff on solaris does not have the -u option.  diff on my SuSE box does, and
it's for unified diff output.  

The line is 43, and looks like: DIFF="diff -iu"

The defines.sh is in the original tar file, and is not generated with
./configure.  It doesn't fix my problem in running tests with 2.1.4 or 2.1.5
(and .4 even core dumps), but it is a bug.  (I tried just removing the u,
but of course the script really expects it.)

--
Andrew Diederich