Most of the rules in the avr makefile are not used anymore

and should be removed. In the meantime we change those needed
to upload flash and eeprom to depend on the default contiki rule
to make the .$(TARGET) executable."

cpu/avr/Makefile.avr

@@ -139,10 +139,10 @@ ifndef NOAVRSIZE
 	avr-size -C --mcu=$(MCU) $@
 endif
 
-%.hex: %.out
+%.hex: %.$(TARGET)
 	$(OBJCOPY) $^ -j .text -j .data -O ihex $@
 
-%.ihex: %.out
+%.ihex: %.$(TARGET)
 	$(OBJCOPY) $^ -O ihex $@
 
 # Add a namelist to the kernel
@@ -160,7 +160,7 @@ endif
 #%.hex: %.elf
 #	$(OBJCOPY) -R .eeprom -R .fuse -R .signature $^ -O ihex $@
 
-%.eep: %.out
+%.eep: %.$(TARGET)
 	-$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \
 	--change-section-lma .eeprom=0 -O ihex $^ $@