add TIMEOUT_INITIALIZER for initting timeout declaractions.
add TIMEOUT_INITIALIZER for initting timeout declaractions.

similar to TASK_INITIALIZER and all the queue _INITIALIZER things.

ok deraadt@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars