Fix debug print and wrong handle dereference in es6 typed array.

R=dslomov@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/14149009

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14330 ce2b1a6d-e550-0410-aec6-3dcde31c8c00