[Openais] gnulib syntax-check preparation

[Jim Meyering]

From: Jim Meyering <meyering at redhat.com>

Hi,

I've prepared a minimal patch to introduce openais to gnulib gently.
The first patch is solely for reference.  It actually adds gnulib
support and hooks to configure.ac and Makefile.am.  The following
patches fix all of the nit-picky problems detected by gnulib's
"make syntax-check" rules.

Those should be useful in their own right, and can be applied
right now.  In particular, the ones that include <config.h> are
important for portability.

Jim