OS-208 DTrace needs to use zone_did to match zone-limited enablings

*** 91,100 ****
--- 91,101 ----
  extern uid_t crgetsuid(const cred_t *);
  extern gid_t crgetgid(const cred_t *);
  extern gid_t crgetrgid(const cred_t *);
  extern gid_t crgetsgid(const cred_t *);
  extern zoneid_t crgetzoneid(const cred_t *);
+ extern zoneid_t crgetzonedid(const cred_t *);
  extern projid_t crgetprojid(const cred_t *);
  
  extern cred_t *crgetmapped(const cred_t *);