patch to create host and build copies of libiberty.a

[Jeffrey A Law]

First, I think we want to tackle this as part of the break and revamp 
the configury and make system after we branch egcs-1.2.

I do have a few meta comments though.

  In message <199812132110.QAA10737@caip.rutgers.edu>you write:
  > 	Another note, I had to nullify AR and RANLIB before calling
  > configure since the definition of those variables made no sense for
  > libiberty/.
Our handling of AR and RANLIB was terribly inconsistent (as you've found).  Jim
cleaned this little turd up a little while ago, but I'm still not sure it's
100% complete.  

I wonder if it makes sense to have the libiberty objects go into a toplevel
host and build directory much like it does for the target.  ie, if I was
building on an hppa1.1-hp-hpux10 box targeting mn10300-elf I'd end up with

gcc texinfo hppa1.1-hp-hpux10/libiberty mn10300-elf/{libiberty, libio, etc}

In my build tree.

I'm still not 100% convinced that we want to support this anyway, but we can
discuss that when we get serious about installing this patch.

jeff