monitor: add journal entries to fan PELs

Adds a new JSON section to the PEL  that contains the last 25 systemd
journal entries indicating which system services have
started/stopped/etc.

Signed-off-by: Mike Capps <mikepcapps@gmail.com>
Change-Id: I9f8a7ab8bb7c213cde30496327d83e9f3fab7c94
2 files changed