adds *.o file sto cleanup

env/common-gcc.mk

@@ -79,6 +79,6 @@ $(CXX_OBJS): %.o: %.cpp $(HEADERS)
 
 .PHONY: clean
 clean:
-	rm -f $(CLEAN_OBJS) $(LIBWRAP) *.a *.hex *.map *.dis *.elf
+	rm -f $(CLEAN_OBJS) $(LIBWRAP) *.a *.hex *.map *.dis *.elf *.o
 
 endif