On some platforms libm (needed for the pow() function) isn't being
linked in somehow. This patch adds the necessary bits to assure that
it's linked in when necessary.
Suggested-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
(cherry picked from commit 20a62b42ec001310a6329d7ee2021f0737d534ef)