Continuous integration variable

src/freedombone-image

 USERNAME="$USER"
 PASSWORD=
 
-CONTINUOUS_INTEGRATION=
+CONTINUOUS_INTEGRATION=""
 
 # IP address of the router (gateway)
 ROUTER_IP_ADDRESS="192.168.1.254"

src/freedombone-image-makefile

 ARCHIVE = $(IMAGE).xz
 SIGNATURE = $(ARCHIVE).sig
 OWNER = 1000
-ifeq ("$CONTINUOUS_INTEGRATION", "")
+ifeq ($(CONTINUOUS_INTEGRATION), "")
     XZ = xz --no-warn --verbose --keep --threads=0 -3 $(IMAGE)
     SIGN = -gpg --output $(SIGNATURE) --detach-sig $(ARCHIVE)
 else