*common.mk: add description about "make golf".

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@15273 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2008-01-27 12:37:58 +00:00 · 2008-01-27 12:37:58 +00:00 · 2ae9745aed
--- a/common.mk
+++ b/common.mk
@ -808,3 +808,4 @@ help:
 	@echo '  test-all:      all ruby tests'
 	@echo '  install:       install all ruby distributions'
 	@echo '  install-nodoc: install without rdoc'
+	@echo '  golf:          make goruby'