Bootstrap build for Nordic nRF52840 Lock Example

The Nordic nRF52840 lock example project assumes openweave-core as a
submodule and uses an in-tree makefile to build openweave.  This adds a
directive to bootstrap openweave-core as part of the lock example by way
of the in-tree makefile.

Author: samhansen

build/nrf5/nrf5-openweave.mk

@@ -194,7 +194,11 @@ define OpenWeaveBuildRules
 $(OPENWEAVE_OUTPUT_DIR)/config.args : .check-config-weave
 	@: # Null action required to work around make's crazy timestamp caching behavior.
 
-$(OPENWEAVE_OUTPUT_DIR)/config.status : $(OPENWEAVE_OUTPUT_DIR)/config.args
+$(OPENWEAVE_ROOT)/configure : $(OPENWEAVE_ROOT)/configure.ac
+	@echo "$(HDR_PREFIX)BOOTSTRAP OPENWEAVE..."
+	$(NO_ECHO)(cd $(OPENWEAVE_ROOT) && ./bootstrap)
+
+$(OPENWEAVE_OUTPUT_DIR)/config.status : $(OPENWEAVE_ROOT)/configure $(OPENWEAVE_OUTPUT_DIR)/config.args
 	@echo "$(HDR_PREFIX)CONFIGURE OPENWEAVE..."
 	$(NO_ECHO)(cd $(OPENWEAVE_OUTPUT_DIR) && $(OPENWEAVE_ROOT)/configure $(OPENWEAVE_CONFIGURE_OPTIONS))