Remove one more automake VERSION reference

Remove one more automake VERSION reference

The configure summary was still referencing the old automake-specific
VERSION var. Use the autoconf PACKAGE_VERSION var instead, so this
actually shows our version.

Reviewed-on: https://gerrit.openafs.org/13360
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
(cherry picked from commit 0f65b40b24599d58cf30bfd47fae83ab54e1416a)

Change-Id: I5bd9399acc6e4c6dd19b94198354b600f35bee15
Reviewed-on: https://gerrit.openafs.org/13790
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>