Fix AC_INIT to get same version as everything else.

Fix AC_INIT to get same version as everything else.

When the version was being set manually in AC_INIT,
it would be different form the version in show ver
from vpp during releases.  This led to breakage
in merge jobs leading to the release.

This fixes that by having A_INIT use the same version
script as everything else.

Change-Id: I45c2857b28153ff52afff0ee753d4dea7c6f7f70
Signed-off-by: Ed Warnicke <[email protected]>