cpu_defines.h not installed in freestanding C++ library. Bug or feature?

[Benjamin Kosnik]

> Is that intentional?

No. Although there may be places in libsupc++ where c++config.h is
included and can be eliminated. If this inclusion can't be eliminated,
then the required bits headers should also be installed for
freestanding.

The list of freestanding headers is also out-of-date for the newer C++0x
changes. I think we were kind of waiting for that to settle down before
fixing it.

-benjamin