Fix white space matching in latin-1 strings wrt \u00a0.

R=dcarney@chromium.org
BUG=181422

Review URL: https://chromiumcodereview.appspot.com/12644008

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@13898 ce2b1a6d-e550-0410-aec6-3dcde31c8c00