* ext/tk/depend: remove the information of tkutil
* ext/tk/make-tkutil: sub-part of Makefile to compile tkutil
* ext/tk/tkutil/tkutil.c: move tkutil.c to subdirectory
* ext/tk/tkutil/subconf.rb: configuration file for tkutil.c
* ext/tk/tkutil/depend: ditto
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@7852 b2dd03c8-39d4-4d8f-98ff-823fe69b080e