Commit `512c98fd7 hv: trace: show cpu usage of vms in pcpu sharing case`
causes the compilation error in release mode:
hypervisor/common/schedule.c:190: undefined reference to `TRACE_16STR'
This patch fixes this issue.
Tracked-On: #861
Signed-off-by: Gao, Shiqing <shiqing.gao@intel.com>