Build ntdll as a real dll, including everything that was previously in
libwine.so. Created a new (mostly empty) libwine.so in library/ subdir.

diff --git a/Make.rules.in b/Make.rules.in
index 6433451..1a9c9f8 100644
--- a/Make.rules.in
+++ b/Make.rules.in
@@ -34,6 +34,8 @@
 YACC      = @YACC@
 LEX       = @LEX@
 LEXLIB    = @LEXLIB@
+LIBEXT    = @LIBEXT@
+LDSHARED  = @LDSHARED@
 RANLIB    = @RANLIB@
 LN_S      = @LN_S@
 DIVINCL   = -I$(SRCDIR) -I. -I$(TOPSRCDIR)/include -I$(TOPOBJDIR)/include