[Go SDK] Correctly return EOFs from boolDecoder
[Go SDK] Correctly return EOFs from boolDecoder

The io.EOF is a special error that's looked for upstream to know that the stream ended normally.
chamikaramj/beam,RyanSkraba/beam,robertwb/incubator-beam,apache/beam,lukecwik/incubator-beam,lukecwik/incubator-beam,chamikaramj/beam,iemejia/incubator-beam,lukecwik/incubator-beam,apache/beam,apache/beam,chamikaramj/beam,lukecwik/incubator-beam,RyanSkraba/beam,robertwb/incubator-beam,lukecwik/incubator-beam,chamikaramj/beam,RyanSkraba/beam,RyanSkraba/beam,robertwb/incubator-beam,robertwb/incubator-beam,lukecwik/incubator-beam,apache/beam,robertwb/incubator-beam,RyanSkraba/beam,chamikaramj/beam,chamikaramj/beam,RyanSkraba/beam,chamikaramj/beam,apache/beam,apache/beam,apache/beam,iemejia/incubator-beam,chamikaramj/beam,apache/beam,lukecwik/incubator-beam,robertwb/incubator-beam,chamikaramj/beam,apache/beam,robertwb/incubator-beam,lukecwik/incubator-beam,apache/beam,robertwb/incubator-beam,RyanSkraba/beam,lukecwik/incubator-beam,robertwb/incubator-beam,apache/beam,chamikaramj/beam,lukecwik/incubator-beam,robertwb/incubator-beam