Extend grokdump with support for maps, transition and descriptor arrays.

Review URL: https://chromiumcodereview.appspot.com/12389077

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@13845 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix linebreak in grokdump

Review URL: https://chromiumcodereview.appspot.com/12433006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@13846 ce2b1a6d-e550-0410-aec6-3dcde31c8c00