win32: additional default libraries

I found the default libs list is still incomplete (incomplete
enough for Tk to fail to build).

This patch adds the additional default libraries to MM_Win32.pm.
Note LDLOADLIBS can be overridden from Makefile.PL (although
Tk/win32 seems to want to set it directly in its Makefile,
rather than via an attribute list, and the direct setting gets
overridden by the default because the default comes later in
the makefile).

The patch is against the jumbo patch that nobody seems to like.
It is *my* new baseline, sorry.

 - Sarathy.
   gsar@engin.umich.edu

p5p-msgid: 199705291332.JAA21560@aatma.engin.umich.edu