install broken for treelang

[David Edelsohn]

>>>>> Mark Mitchell writes:

Mark> As I said yesterday, I think we should *require* makeinfo for
Mark> development builds; if the .info files are not already present in the
Mark> $(srcdir), I think you should have to have makeinfo installed.

	I would be happy to have Makeinfo on AIX, except it does not build
correctly. 

	I still get the g77.info error after manually patching the
Makefile in my build.  It seems like an error is not being ignored.

David