[augeas-devel] gnulib update for AIX support

[Matthew Booth]

These 2 patches update gnulib to the latest version, and import getopt-gnu.
They're intended to make augeas compile on AIX, but I'm not personally able to
test that.

Note that gnulib now contains a stock bootstrap file which is configurable from
a bootstrap.conf file. This is the new 'best' way of doing this, apparently.
Unfortunately I hit a couple of snags trying to use it, so this patch makes
minimal touches to the existing version. I've submitted patches upstream for the
problems I hit. Another augeas bootstrap patch in due course.

Matt