subdirectories.
All final products go into the current directory (i.e., PCbuild).
Object files go into temp-release and temp-debug.
Debug versions of DLLs have _d appended to their basename, e.g. the
debug version of python15.dll is python15_d.dll, the debug version of
python.exe is python_d.exe, and the debug version of parser.pyd is
parser_d.pyd. (See corresponding patch to importdl.c.) Uniformly
changed all extension modules to use .pyd, not .dll.