contrib: OSX: add sparkle (doesn't build)

contrib/src/sparkle/SHA512SUMS

+645c8878af97a398db5d7835f0fa905a75945d8d5534cbeea1031b69d4ee018633905c6d365c7e8e725c4764009db9549582883582041d73bceacf7d689dc7fa  sparkle-1.5b6.zip

contrib/src/sparkle/rules.mak

+# sparkle
+
+SPARKLE_VERSION := 1.5b6
+SPARKLE_URL := http://sparkle.andymatuschak.org/files/Sparkle%20$(SPARKLE_VERSION).zip
+
+ifdef HAVE_MACOSX
+PKGS += sparkle
+endif
+
+$(TARBALLS)/sparkle-$(SPARKLE_VERSION).zip:
+	$(call download,$(SPARKLE_URL))
+
+.sum-sparkle: sparkle-$(SPARKLE_VERSION).zip
+
+sparkle: sparkle-$(SPARKLE_VERSION).zip .sum-sparkle
+	$(RM) -R $@ && mkdir -p $@ && cd $@ $(foreach f,$(filter %.zip,$^), && unzip ../$(f))
+	touch $@
+
+.sparkle: sparkle
+	cd $</Extras/Source\ Code && $(MAKE) && exit 1 #FIXME
+	touch $@