swap out static approach to fix -lcrt0 error on darwin

Makefile

@@ -1,5 +1,5 @@
 bin/objectfilter:
-	go build -ldflags '-X main.Version=$(shell git describe --tags) -extldflags "-static"' -o $@ ./src
+	go build -ldflags '-X main.Version=$(shell git describe --tags)' -tags osusergo,netgo -o $@ ./src
 
 module.tar.gz: bin/objectfilter
 	tar czf $@ $<