Add mkfifo and logger to the installer CD-ROM ISO image.

Without these utilities, the installer prints a lot of debugging
information to stdout.  With these utilities available, the
debugging output from the logger goes into log files in /tmp.
On my system, the log files were:

/tmp/install_worker.gui_error_log.ouy8tlzc
/tmp/install_worker.verboselog.A9CoPOsM
/tmp/instfifo.iW7Pr4kK/install.log

Ticket: #3139