Fix a subtle bug in cpp_use_include_path.

Summary:
I thought I had eliminated all the places where work was only done
if cpp_use_include_path was set.  I guess I missed one.

Reviewed By: mcslee, mrabkin, kholst

Test Plan:
Built BigGrep and looked at the generated code.

Revert Plan: ok

DiffCamp Revision: 8375


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665530 13f79535-47bb-0310-9956-ffa450edef68
1 file changed