do-release-commit-and-tag: simplify func_sort_ver.
do-release-commit-and-tag: simplify func_sort_ver.

* build-aux/do-release-commit-and-tag (func_sort_ver): Use
simpler definition from bootstrap.

Signed-off-by: Gary V. Vaughan <f9023000f29773649f3850298becb9544b5fd6a9@gnu.org>

gvvaughan/slingshot