[Bug libgomp/30546] [4.3 regression] build fail in libgomp because makeinfo is missing

[Andrew Pinski]

> Thus, two options present themself: ditch automake generated targets, do it
> manually as everywhere else or tweak the Makefile.am to touch libgomp.info
> before invoking `missing makeinfo`. 
> 
> Preferences?

This only matters when building from SVN.  I say we should just require makeinfo
and forget about the problem.

-- Pinski