Revert "Revert "fixed STLDFLAG order in broken st Makefile""

This reverts commit 274d46ace00003d1df718b974d17642cbce167d5.

Sorry, the original commit was correct after all. It allows has the
correct link order and supports static-linking also.

Just a reminder: it is important to give a (brief) rationale of the
patch intentions.

Makefile

@@ -27,7 +27,7 @@ x.o: arg.h st.h win.h
 $(OBJ): config.h config.mk
 
 st: $(OBJ)
-	$(CC) $(STLDFLAGS) -o $@ $(OBJ)
+	$(CC) -o $@ $(OBJ) $(STLDFLAGS)
 
 clean:
 	rm -f st $(OBJ) st-$(VERSION).tar.gz