erlang: Separate out thrift_binary_protocol:read_data

By giving a different name to the function that reads bytes from the
transport, we can get a slightly more detailed spec.

git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@990975 13f79535-47bb-0310-9956-ffa450edef68
2 files changed