[ODE] Automatic generation of MSVC DLL exports list config/msvcdefs.def

[nlin@nlin.net]

For the first time I tried to use functions dBodyAddRelTorque and
dBodyAddRelForceAtRelPos from the MSVC DLL compile of ODE and found out
that these two functions were missing from the DLL exports file
config/msvcdefs.def, which I originally created by hand.

Russ, I think you said that there was some way of generating this list
automatically from the source code via automatic extraction of function names
with tags or some other sort of text processing approach? Maybe this would
be an item to add to the to do list.

-Norman