Remove -L$(libdir) from DLLLIBS to prevent linking with an old version

(i.e., 7.0.3) of libpostgres.a.  From Jason Tishler <jt@dothill.com>.

src/makefiles/Makefile.win

-# $Header: /cvsroot/pgsql/src/makefiles/Attic/Makefile.win,v 1.7 2000/10/21 22:36:13 petere Exp $
+# $Header: /cvsroot/pgsql/src/makefiles/Attic/Makefile.win,v 1.8 2001/01/09 18:45:41 petere Exp $
 LDFLAGS+= -g
 DLLTOOL= dlltool
 DLLWRAP= dllwrap
-DLLLIBS=-L/usr/local/lib -L$(libdir) -L$(top_builddir)/src/backend -lpostgres -lcygipc -lcygwin -lcrypt -lkernel32
+DLLLIBS=-L/usr/local/lib -L$(top_builddir)/src/backend -lpostgres -lcygipc -lcygwin -lcrypt -lkernel32
 MK_NO_LORDER=true
 MAKE_DLL=true
 #MAKE_DLL=false