[Bug 270435] makefs: cd9660 output is nonreproducible

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=270435

            Bug ID: 270435
           Summary: makefs: cd9660 output is nonreproducible
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: misc
          Assignee: bugs@FreeBSD.org
          Reporter: emaste@freebsd.org

makefs uses time(NULL) for the timestamp on the . directory entry, resulting in
non-reproducible output

--- t1.iso
+++ t2.iso
├── file list
│ @@ -1,2 +1,2 @@
│ -drwxr-xr-x   2     1001     1001     2048 2023-03-24 18:27:59.000000 .
│ +drwxr-xr-x   2     1001     1001     2048 2023-03-24 18:28:00.000000 .
│  -rw-r--r--   1     1001     1001        0 2023-03-24 18:27:59.000000
1234.567

code reference:
usr.sbin/makefs/cd9660.c:       time_t tstamp = stampst.st_ino ?
stampst.st_mtime : time(NULL);

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