enable n32 and n64, and move o32 into mips/mips32

[Alexandre Oliva]

I'm having a lot of trouble getting glibc in CVS to build for any mips
port.  It appears that, unlike glibc 2.3.1, on which I based the
mips64-linux port, glibc now requires TLS support, which MIPS doesn't
have.  Are non-TLS ports require to get TLS support or die?  I'm
afraid I can't even think of introducing TLS support on MIPS at the
moment, and without that, not even mips-linux-gnu will build.

Thoughts?

-- 
Alexandre Oliva   Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer                 aoliva@{redhat.com, gcc.gnu.org}
CS PhD student at IC-Unicamp        oliva@{lsd.ic.unicamp.br, gnu.org}
Free Software Evangelist                Professional serial bug killer