[PATCH] Fix section ording warnings in memory.texi with texinfo-5.0

[Paul Eggert]

On 02/21/13 05:14, Allan McRae wrote:
> What appears to throw the new texinfo off is @menu sections within
> @subsections.

Texinfo 5.0 doesn't like @subsection without @node, and gets
confused if you do something like that.  (I found this out when
formatting the Emacs manual, and yes, the diagnostics are
pretty confusing.)  My guess is that you need to add some
@node directives.