[emms-help] Info file installed does not have the .info suffice

[Alex Vong]

Hi,

I noticed in the makefile, the following line:
  install -m 0644 $(DOCDIR)emms.info $(INFODIR)/emms
would install the info file without the .info suffice.

It causes problems, because the package manager I am using (GNU Guix)
geneate a dir file for emacs by finding all the info file based on the
file suffice.

I would suggest to change the above line to:
  install -m 0644 $(DOCDIR)emms.info $(INFODIR)/emms.info
which would fix the issue. What do you think?

Thanks,
Alex