[C++-sig] Problem with python-debugging

[Thomas Berg]

The problem is not bjam, but boost/config/auto_link.hpp. This header has hard-
coded the naming convention of the boost debug libraries to "-gd", it just 
doesn't know about the "-gyd" convention for python debugging.

I worked around the problem by disabling the autolink-feature, by defining 
"BOOST_ALL_NO_LIB" when building. Bjam already links to the correct "-gyd" 
version (I think), so this just prevents Visual Studio from pulling in the "-
gd" in addition...

Thomas