Update V8 to version 3.24.21.1

R=machenbach@chromium.org

Review URL: https://codereview.chromium.org/141763004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246432 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246433 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246433