RUBY-1173 Move BSON_BYTE_ORDER definition back to original location
RUBY-1173 Move BSON_BYTE_ORDER definition back to original location

estolfo/bson-ruby,estolfo/bson-ruby,mongodb/bson-ruby,estolfo/bson-ruby,ukblewis/bson-ruby,mongodb/bson-ruby,ukblewis/bson-ruby,ukblewis/bson-ruby,ukblewis/bson-ruby,estolfo/bson-ruby,mongodb/bson-ruby,mongodb/bson-ruby