tests for winsock and msvcrt won't link

[Dan Kegel]

I updated to CVS yesterday, and now I get an error
when building wine, namely: winsock and msvcrt tests
won't link because they can't find accept and feof,
respectively.  Commenting out the SUBDIRS= lines in
those two DLLs' Makefiles got me past it (I think;
it's still building).
This problem was not present in the most recent snapshot.
- Dan