THRIFT-358. ruby:  Change how external thrift files' generated code is required

Generated code that relies on included thrift files now doesn't assume the path will be the same.

git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@750667 13f79535-47bb-0310-9956-ffa450edef68
1 file changed