updated for version 7.3.836
Problem:    Clipboard does not work on Win32 when compiled with Cygwin.
Solution:   Move the Win32 clipboard code to a separate file and use it when
            building with os_unix.c. (Frodak Baksik, Ken Takata)
diff --git a/src/Make_bc5.mak b/src/Make_bc5.mak
index 739fc62..3eb0869 100644
--- a/src/Make_bc5.mak
+++ b/src/Make_bc5.mak
@@ -694,7 +694,7 @@
 
 !if ($(OSTYPE)==WIN32)
 vimobj = $(vimobj) \
-	$(OBJDIR)\os_win32.obj $(OBJDIR)\os_mswin.obj
+	$(OBJDIR)\os_win32.obj $(OBJDIR)\os_mswin.obj $(OBJDIR)\winclip.obj
 !elif ($(OSTYPE)==DOS16)
 vimobj = $(vimobj) \
 	$(OBJDIR)\os_msdos.obj