uts: give privilege macros more sensible names

*** 804,814 ****
                          oldcred = curthread->t_cred;
                          curthread->t_cred = cred;
                          crfree(oldcred);
  
                          if (priv_basic_test >= 0 &&
!                             !PRIV_ISASSERT(&CR_IPRIV(newcred),
                              priv_basic_test)) {
                                  pid_t pid = pp->p_pid;
                                  char *fn = PTOU(pp)->u_comm;
  
                                  cmn_err(CE_WARN, "%s[%d]: exec: basic_test "
--- 804,814 ----
                          oldcred = curthread->t_cred;
                          curthread->t_cred = cred;
                          crfree(oldcred);
  
                          if (priv_basic_test >= 0 &&
!                             !PRIV_ISMEMBER(&CR_IPRIV(newcred),
                              priv_basic_test)) {
                                  pid_t pid = pp->p_pid;
                                  char *fn = PTOU(pp)->u_comm;
  
                                  cmn_err(CE_WARN, "%s[%d]: exec: basic_test "