roken: Export rk_daemon, not daemon

roken: Export rk_daemon, not daemon

We never export a function called 'daemon'. We only export a function
called rk_daemon, and the define daemon to rk_daemon. So, only include
rk_daemon in the map file, since that is the only symbol that will
appear.

Change-Id: Ib0f5ba88ba6d8bdefe3191050bc9e9e36f1b9134
Reviewed-on: http://gerrit.openafs.org/3463
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>