sysstat version 12.7.1 final packaging.
Changelog added.
spec and lsm files updated.

This version adds some small new features, like option -H to mpstat to
handle vCPU physical hotplug, or true time mode support to sadf's SVG
output.
It also fixes several bugs, one of which has been the object of a
security advisory (CVE-2022-39377).

Signed-off-by: Sebastien GODARD <sysstat@users.noreply.github.com>