Thrift: "make check" support.

Summary:
Add a Makefile.am in the test directory that runs some of the test programs
when "make check" is executed.  Also removed some obsolete comments.

Reviewed By: mcslee

Test Plan:
Ran make check, saw all tests pass.
Ran make install, saw no test programs installed.
Ran ./cleanup.sh, saw a pristine workspace.

Revert Plan: ok


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665458 13f79535-47bb-0310-9956-ffa450edef68