* tool/update-deps (in_makefile): Use FILES_NEED_VPATH and
  FILES_CONFUSING.

* ext/objspace/extconf.rb: Add VPATH for id.h



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48524 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Forgot to commit.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48525 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Update dependency.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48526 b2dd03c8-39d4-4d8f-98ff-823fe69b080e