[build] Automatically sort the list of constituent object sizes

src/Makefile.housekeeping

 $(BIN)/%.objs : $(BIN)/%.tmp
 	$(Q)$(ECHO) $(call objs_list,$<)
 $(BIN)/%.sizes : $(BIN)/%.tmp
-	$(Q)$(SIZE) -t $(foreach OBJ,$(call objs_list,$<),$(BIN)/$(OBJ).o)
+	$(Q)$(SIZE) -t $(foreach OBJ,$(call objs_list,$<),$(BIN)/$(OBJ).o) | \
+		sort -g
 
 # Get dependency list for the specified target
 #