util/mktar.pl: Change 'VERSION' to 'VERSION.dat'
This was forgotten when that file changed name, and that unfortunately
disrupts releases.
HERE=`dirname $0`
# Get all version data as shell variables
-. $HERE/../VERSION
+. $HERE/../VERSION.dat
if [ -n "$PRE_RELEASE_TAG" ]; then PRE_RELEASE_TAG=-$PRE_RELEASE_TAG; fi
version=$MAJOR.$MINOR.$PATCH$PRE_RELEASE_TAG$BUILD_METADATA
