Arcyd: log git snoop and conduit refresh times
Arcyd: log git snoop and conduit refresh times

To make it easier to determine where slowdowns are happening, add the
'git snoop refresh' and 'conduit refresh' actions to the things that are
logged as remote io read events.

Test Plan:
$ ./precommit.sh
$ ./testbed/arcyd/test_shell.sh
    $ tail ../arcyd/var/log/debug -f
    .. observe that snoop and conduit refresh are logged ..

kjedruczyk/phabricator-tools,bloomberg/phabricator-tools,kjedruczyk/phabricator-tools,cs-shadow/phabricator-tools,cs-shadow/phabricator-tools,aevri/phabricator-tools,bloomberg/phabricator-tools,bloomberg/phabricator-tools,bloomberg/phabricator-tools,cs-shadow/phabricator-tools,kjedruczyk/phabricator-tools,aevri/phabricator-tools,aevri/phabricator-tools,kjedruczyk/phabricator-tools,kjedruczyk/phabricator-tools,aevri/phabricator-tools,cs-shadow/phabricator-tools,cs-shadow/phabricator-tools,bloomberg/phabricator-tools,aevri/phabricator-tools