order of checking for readline in configure.ac

[Mike Miller]

Rik,

I see that you moved OCTAVE_ENABLE_READLINE to an earlier point in
configure in this change:

http://hg.savannah.gnu.org/hgweb/octave/rev/36cbcc37fdb8

I just noticed this breaks the readline check for me on an older
system (RHEL5) where TERM_LIBS needs to be found first. As you can see
from the changeset it used to be right after TERM_LIBS. Would it be
worth making an OCTAVE_CHECK_TERM_LIBS function and have the readline
function AC_REQUIRE it to protect against this in the future or should
we just shuffle the order back so it works?

-- 
mike