swift234

PrintAsObjC: use getObjCPropertyName() consistently for property name

This is NFC, because we were already properly using
getObjCPropertyName() for the general case. Only the
imported-from-an-NSUInteger property case remained, which will
currently have getName() == getObjCPropertyName(). But, be consistent
to be more future-proof, if renaming of @properties should come.

Swift SVN r28782