Add member "vcpu_lock" and "active" to each vcpu_quantum.

Logger can support multi-cpus to write into one "vcpu_id" now.
Because of the interface, the code has not been debugged yet.

vcpu_lock: the lock of each vcpu_quantum
active: when print_record(), if the vcpu_quantum is not active,
	it just returns doing nothing.
Signed-off-by: tanle <tamlokveer@gmail.com>