ChangeLog: fix typo

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46283 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
configure.in: remove rb_cv_typeof

* configure.in (rb_cv_typeof): no longer needed because of
  AC_C_TYPEOF.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46284 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46285 b2dd03c8-39d4-4d8f-98ff-823fe69b080e