Missing these caused failures on platforms depending on them as well as general
failures of the dedicated tests for the tuple implementation.
Change was tested by running 'make distcheck' and then extracting the result to
an entirely separate location (a subdirectory is insufficient, thank you
Autotools) and running './configure; make check'.
POSIX regex support. Patch contributed by Monty Taylor <monty.taylor@gmail.com>
to the protocol buffer project, and relayed by Kenton to GoogleTest. Tweaked to
include the new define in the #endif comment.
chandlerc