Generate hex with proper device identification

Makefile

@@ -33,12 +33,15 @@ VERSION_FILE = ${BUILD_DIR}/version.h
 LANG_TEMPLATE = ${I18N}/${PROJECT}-${VERSION}.pot
 
 default: DEFS += -DUSB_PRODUCT='"Original Prusa CW1"' -DUSB_PID=0x0008 -DSERIAL_COM_DEBUG
+default: DEVICE = cw1
 default: $(addprefix $(BUILD_DIR)/, ${PROJECT}-${LANG}-devel.hex)
 
 dist: DEFS += -DUSB_PRODUCT='"Original Prusa CW1"' -DUSB_PID=0x0008
+dist: DEVICE = cw1
 dist: $(addprefix $(BUILD_DIR)/, ${PROJECT}-${LANG}-${VERSION}.hex)
 
 cw1s: DEFS += -DCW1S -DUSB_PRODUCT='"Original Prusa CW1S"' -DUSB_PID=0x000F
+cw1s: DEVICE = cw1s
 cw1s: $(addprefix $(BUILD_DIR)/, ${PROJECT_CW1S}-${LANG}-${VERSION}.hex)
 
 .PHONY: clean distclean lang_extract default dist ${VERSION_FILE}.tmp doc
@@ -55,7 +58,7 @@ $(BUILD_DIR)%/.:
 
 $(BUILD_DIR)/%.hex: ${BUILD_DIR}/%.elf
 	${OBJCOPY} -O ihex -R .eeprom $< $@.tmp
-	@echo "; device = cw1" > $@
+	@echo "; device = ${DEVICE}" > $@
 	@echo >> $@
 	cat $@.tmp >> $@
 	rm $@.tmp