add mqtt int files to inst target

Makefile.am

@@ -11,13 +11,19 @@ EXTRA_DIST = LICENSE \
 	README.md \
 	VERSION
 
+if MQTT
+MQTT_INST_ADD = mkdir -p $(DESTDIR)/etc/ebusd/; \
+	cp -n $(srcdir)/contrib/etc/ebusd/mqtt-*.cfg $(DESTDIR)/etc/ebusd
+endif
+
 install-data-hook:
 	@if [ -f "/etc/debian_version" ]; then \
 	  mkdir -p $(DESTDIR)/etc/default/ $(DESTDIR)/etc/init.d/ $(DESTDIR)/lib/systemd/system/; \
 	  cp -n $(srcdir)/contrib/debian/default/ebusd $(DESTDIR)/etc/default/; \
 	  cp $(srcdir)/contrib/debian/init.d/ebusd $(DESTDIR)/etc/init.d/; \
 	  cp $(srcdir)/contrib/debian/systemd/ebusd.service $(DESTDIR)/lib/systemd/system/; \
-	fi
+	fi \
+	$(MQTT_INST_ADD)
 
 test:
 	$(MAKE) -C src/lib/ebus/test