11238 librtld_db demos should work with gcc 7

*** 328,338 ****
                  return (PS_ERR);
  
          if (read(lwpfd, &lwpstatus, sizeof (lwpstatus)) == -1)
                  return (PS_ERR);
  
!         gregset = lwpstatus.pr_reg;
  
          (void) close(lwpfd);
          return (PS_OK);
  }
  
--- 328,338 ----
                  return (PS_ERR);
  
          if (read(lwpfd, &lwpstatus, sizeof (lwpstatus)) == -1)
                  return (PS_ERR);
  
!         memcpy(gregset, lwpstatus.pr_reg, sizeof (*gregset));
  
          (void) close(lwpfd);
          return (PS_OK);
  }