[NaCl SDK Docs] Check in the generated NaCl SDK Documentation.

This is necessary so that the Chromesite server can poll for changes and
automatically update.

I can't upload the full docs/images to Rietveld, so this review will
just be empty and I'll manually commit.

BUG=none
R=awatson@chromium.org, sbc@chromium.org

Review URL: https://codereview.chromium.org/140993006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246665 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246665