Fix LICENSE [1][2]

• While I'm here, add NO_ARCH

Approved by: portmgr (blanket)
Reference: https://github.com/nats-io/nats-pure.rb/commit/46e6620373b5b3c2ad0d31111093503691a7f827 [1]

		https://github.com/nats-io/nats-pure.rb/blob/master/LICENSE [2]