add CPU spin support on OpenBSD (#471)
add CPU spin support on OpenBSD (#471)

* add CPU spin support on OpenBSD

* use consistent ifdefs
Dettorer/i3status,Gravemind/i3status,Dettorer/i3status,i3/i3status,Gravemind/i3status,Gravemind/i3status,Dettorer/i3status,i3/i3status,i3/i3status,i3/i3status,Dettorer/i3status,Gravemind/i3status