[patch] simplify install links

[Mike Frysinger]

there's no need to do `rm; ln` when `ln -f` will do the same thing

also, for softlinks in the bindir, just use relative ones rather than absolute
-mike

--- a/Makefile.in	Tue Dec 03 22:00:38 2013 +0800
+++ b/Makefile.in	Sun Dec 08 20:25:54 2013 -0500
@@ -126,15 +126,13 @@ install: $(addprefix inst_, $(TARGETS))
 
 insmultidropbear: dropbearmulti
 	$(INSTALL) -d $(DESTDIR)$(sbindir)
-	-rm -f $(DESTDIR)$(sbindir)/dropbear$(EXEEXT)
-	-ln -s $(bindir)/dropbearmulti$(EXEEXT) $(DESTDIR)$(sbindir)/dropbear$(EXEEXT) 
+	-ln -sf $(bindir)/dropbearmulti$(EXEEXT) $(DESTDIR)$(sbindir)/dropbear$(EXEEXT)
 	$(INSTALL) -d $(DESTDIR)$(mandir)/man8
 	$(INSTALL) -m 644 dropbear.8  $(DESTDIR)$(mandir)/man8/dropbear.8
 
 insmulti%: dropbearmulti
 	$(INSTALL) -d $(DESTDIR)$(bindir)
-	-rm -f $(DESTDIR)$(bindir)/$*$(EXEEXT) 
-	-ln -s $(bindir)/dropbearmulti$(EXEEXT) $(DESTDIR)$(bindir)/$*$(EXEEXT) 
+	-ln -sf dropbearmulti$(EXEEXT) $(DESTDIR)$(bindir)/$*$(EXEEXT)
 	$(INSTALL) -d $(DESTDIR)$(mandir)/man1
 	$(INSTALL) -m 644 $*.1  $(DESTDIR)$(mandir)/man1/$*.1
 
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