Always rebuild with `make`

`make` doesn't know how to tell if it needs to recompile or not, but
`cargo` does, so we should always call through into `cargo`.

Makefile

@@ -22,4 +22,4 @@ $(INSTALL):
 
 install: build $(INSTALL)
 
-.PHONY: install
+.PHONY: $(BUILD) build-no-git $(INSTALL)