[PATCH] update automake version to 1.11.6

[Joel Brobecker]

> Debian stable (wheezy) and newer only have 1.11.6.
> Ubuntu Trusty and newer only have 1.11.6.
> Gentoo dropped <=1.11.5 2 years ago.
> Fedora R17 was the last one to offer 1.11.x (it was 1.11.6).
> Centos 7 doesn't offer any 1.11.x version.
> OpenSUSE 12.2 was the last one to offer 1.11.x.
> Arch Linux dropped 1.11.x 3 years ago.
> Mageia 2 was the last one to offer 1.11.x.
> 
> So anyone who readily has access to automake 1.11.[0-5] is using a two
> year old distro that is no longer supported.  Lets use 1.11.6 as it's
> the only 1.11.x version that is easily available.
> 
> 2015-03-14  Mike Frysinger  <vapier@gentoo.org>
> 
> 	* README-maintainer-mode: Update automake to 1.11.6.

FWIW, I tend to avoid using the auto-tools already installed, because
I don't know what patches they might contain. Those patches can result
in small differences which inexplicably show up when you regenerate
some files after making some modifications. That's why I rebuilt
them all from source, and use them when regenerating files.

All in all, I'm not against switching to 1.11.6 but we should then
regenerate all affected files now, and I would prefer it if that was
done using an unmodified release rather than one that might have been
modified by the distro.

-- 
Joel