Merge git rev 2908585 by Brooks from the Cheri Clang tree:

  (u)intmax_t is (unsigned) long on FreeBSD mips64.  This corrects the
  bizzare error:

  error: format specifies type
        'uintmax_t' (aka 'unsigned long long') but the argument has type
        'uintmax_t' (aka 'unsigned long') [-Werror,-Wformat]
                  printf("  Len: %ju\n", (uintmax_t)sb->sb_sandboxlen);
                                 ~~~     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                 %ju