Hopefully fixed windows build. Now support -DLL_DEBUG_HAVOK:BOOL=ON to enable...

Hopefully fixed windows build. Now support -DLL_DEBUG_HAVOK:BOOL=ON to enable Havok Hyrbid (fulldebug) libs to link in Windows RelWithDebInfo. On other platforms, that flag will cause RelWithDebInfo to link against Havok fulldebug libs. The rest of the time, RelWithDebInfo will link to Havok Debug and Debug will link to Havok Fulldebug