find.rb: add ignore_error
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45241 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
find.rb: add ignore_error
defaulted to true. [ruby-core:51025] [Feature #7596]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45241 b2dd03c8-39d4-4d8f-98ff-823fe69b080e