contrib: sparkle: patch project config to force arch with xcode 3

contrib/src/sparkle/rules.mak

@@ -16,6 +16,7 @@ sparkle: sparkle-$(SPARKLE_VERSION).zip .sum-sparkle
 	$(RM) -R $@ && mkdir -p $@ && cd $@ && unzip ../$<
 	cd $@/Extras/Source\ Code/Configurations && \
 		sed -i.orig -e s/"GCC_TREAT_WARNINGS_AS_ERRORS = YES"/"GCC_TREAT_WARNINGS_AS_ERRORS = NO"/g \
+            -e s/"ARCHS = .*"/"ARCHS = $(ARCH)"/ \
 			ConfigCommonRelease.xcconfig && \
 		sed -i.orig -e s/10\.4/$(OSX_VERSION)/g -e s/10\.5/$(OSX_VERSION)/g ConfigCommon.xcconfig
 	touch $@