Add "make bloatcheck" to run Matt Mackall's bloat-o-meter. Copy an old

busybox_unstripped to busybox_old, build a new version, and "make bloatcheck"
to see a detailed breakdown of the size difference.

Makefile

@@ -132,6 +132,8 @@ help:
 	@echo '  uninstall'
 	@echo
 	@echo 'Development:'
+	@echo '  bloatcheck             - show size difference between busybox_unstripped'
+	@echo '                           and busybox_old
 	@echo '  check			- run the test suite for all applets'
 	@echo '  checkhelp		- check for missing help-entries in Config.in'
 	@echo '  randconfig		- generate a random configuration'
@@ -358,6 +360,9 @@ checkhelp:
 .PHONY: sizes
 sizes: busybox_unstripped
 	$(NM) --size-sort $(<)
+.PHONY: bloatcheck
+bloatcheck: busybox_old busybox_unstripped
+	@scripts/bloat-o-meter busybox_old busybox_unstripped
 
 .PHONY: objsizes
 objsizes: busybox_unstripped