TET including threads and C++ support.
The port has a number of quirks:
- sources and binaries need to be installed under $TET_ROOT
for later persual by test suites like the PCTS suite
from the opengroup. Consequently this port does not actually
install anything under $PREFIX.
- though the source to TET3.2c is being made publically
available, one still needs to register with the open group
prior to download the sources. Consequently this port
has been marked `MANUAL_FETCH'.
