THRIFT-928. cpp: Make clients call writeEnd on their transports before flush

Changing the order of these calls makes more sense from the perspective
of logical operations.  It also simplifies the upcoming stats collection
code.  No clients should be affected.

git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@1005128 13f79535-47bb-0310-9956-ffa450edef68
3 files changed