swift234

Expose canInstUseRefCountValues as swift::canNeverUseValues.

canInstUseRefCountValues should have always been named
canInstNotUseRefCountValues. I don't remember how it get renamed as such. Even
though it is a little weird to have a "canNever" in a function name, it makes
sense here to contrast it with canUseValue which returns if a specific user can
use a ptr in a way that requires the ptr to be alive. This in contrast says that
a user can never use a ptr in a manner where the ptr must be alive. I.e. this is
a universal quantifier.

Swift SVN r22961