add loramac, and make the subtree stuff generic..

Makefile

@@ -88,14 +88,20 @@ runtests:
 .c.o:
 	$(ARMCC) $(ARMTARGET) $(CFLAGS) -c $< -o $@
 
+STROBE_NAME = strobe
 STROBE_REPO = https://git.code.sf.net/p/strobe/code
 STROBE_BRANCH = master
-STROBE_PATH = strobe
 
-.PHONY: init-strobe
-init-strobe:
-	git subtree add -P $(STROBE_PATH) --squash $(STROBE_REPO) $(STROBE_BRANCH)
+LORAMAC_NAME = loramac
+LORAMAC_REPO = https://github.com/Lora-net/LoRaMac-node.git
+LORAMAC_BRANCH = master
 
-.PHONY: update-strobe
-update-strobe:
-	git subtree pull -P $(STROBE_PATH) --squash $(STROBE_REPO) $(STROBE_BRANCH)
+.for module in STROBE LORAMAC
+.PHONY: init-$($(module)_NAME)
+init-$($(module)_NAME):
+	git subtree add -P $($(module)_NAME) --squash $($(module)_REPO) $($(module)_BRANCH)
+
+.PHONY: update-$($(module)_NAME)
+update-$($(module)_NAME):
+	git subtree pull -P $($(module)_NAME) --squash $($(module)_REPO) $($(module)_BRANCH)
+.endfor