merge revision(s) 37905: [Backport #8757]

	* configure.in (opt-dir): don't use non portable flag -E of sed.


git-svn-id: svn+ssh://svn.ruby-lang.org/ruby/branches/ruby_1_9_3@44820 b2dd03c8-39d4-4d8f-98ff-823fe69b080e