Get a few more generated files into release tarballs

The generated code for the C++ automated tests is all put into
one (non-installed) library.  This change updates the list of
sources for the library to (1) eliminate sources that aren't
used and (1) include the relevant header files.  The headers
aren't acutally built into the library, but listing them causes
them to be included in the release tarball.  They also had to
be added to the code-generating rules so make would know how
to build them.  Now "make check" works out of the box in
release tarballs (after configure).


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@756347 13f79535-47bb-0310-9956-ffa450edef68