Fix host-error-monitor recipe to build in Yocto

A recent update to build outside of Yocto required the flag to
build in Yocto, so set the flag.  Also remove a CFLAG that is
not needed.

Tested:
Built in Yocto.

Change-Id: I4e466bd4f7a6485365291b85405b22477486bf8c
Signed-off-by: Jason M. Bills <jason.m.bills@linux.intel.com>
1 file changed