Update Makefile

Update install rule to require build-simavr and build-parts. That should fix #271.

Author: k3a

Makefile

@@ -23,15 +23,12 @@ build-examples: build-simavr
 build-parts: build-examples
 	$(MAKE) -C examples/parts RELEASE=$(RELEASE)
 
-install:
+install: build-simavr build-parts
 	$(MAKE) -C simavr install RELEASE=$(RELEASE)
 
 doc:
 	$(MAKE) -C doc RELEASE=$(RELEASE)
 
-install:
-	$(MAKE) -C simavr install
-
 clean:
 	$(MAKE) -C simavr clean
 	$(MAKE) -C tests clean