StrictOrder marked explicitly to be in Prop
StrictOrder marked explicitly to be in Prop

 In fact, due to sort-polymorphism, StrictOrder was already in Prop,
 but it's clearer this way.

git-svn-id: 44dc50bdcc0f5d1a212c497508dc9452e0b35e2b@14259 85f007b7-540e-0410-9357-904b9bb8a0f7

maximedenes/native-coq,maximedenes/native-coq,maximedenes/native-coq