egcs-970828: Some nits

[Joe Buck]

> Actually, you'll find the next snapshot will _not_ install texinfo
> as it's an old version and is only included so that the info files
> can be recreated.

If it isn't going to be installed, we might want to include only the
makeinfo program, leaving out the info reader and the Emacs macros.  Only
the texinfo/makeinfo directory is needed, plus a change to link against
libiberty.a instead of libtxi (libtxi is just a subset of libiberty and
can go away).