bug#11999: 24.1.50; New Info file suffix ".info" breaks `Info-find-node-2'

[Drew Adams]

> > This is the problem - there is no such file:
> >   info-file-exists-p("c:/Emacs-24-2012-07-16/info/emacs")
> 
> Thus info-file-exists-p correctly returns nil.  What is the problem?

This Emacs code still expects the Emacs Info file to have no suffix - it does
not look for a file named with a suffix.

But Emacs Dev has changed the file names now so that they do have a suffix.
Emacs thus cannot find the Info files that Emacs Dev provides.