[NaCl SDK AppEngine] Fix lua URLs to support loading from https.

(This fixes a few URLs I forgot in r237102)

BUG=none
R=sbc@chromium.org

Review URL: https://codereview.chromium.org/85803003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@237167 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 237167