mkfs-util: Set FORK_REOPEN_LOG

We set FORK_CLOSE_ALL_FDS, so we should also set FORK_REOPEN_LOG to
reopen the log in the child process so we don't miss any logging
messages.

src/shared/mkfs-util.c

@@ -603,7 +603,7 @@ int make_filesystem(
                         /*except_fds=*/ NULL,
                         /*n_except_fds=*/ 0,
                         FORK_RESET_SIGNALS|FORK_RLIMIT_NOFILE_SAFE|FORK_DEATHSIG|FORK_LOG|FORK_WAIT|
-                        FORK_CLOSE_ALL_FDS|FORK_REARRANGE_STDIO|FORK_NEW_MOUNTNS,
+                        FORK_CLOSE_ALL_FDS|FORK_REARRANGE_STDIO|FORK_NEW_MOUNTNS|FORK_REOPEN_LOG,
                         /*ret_pid=*/ NULL);
         if (r < 0)
                 return r;