[NaCl SDK] Change default in common.js to Release.

This way navigating to http://localhost:5103/examples/foo?tc=pnacl will use
"Release" by default.

BUG=none
R=nfullagar@chromium.org

Review URL: https://codereview.chromium.org/26291003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227382 0039d316-1c4b-4281-b951-d872f2087c98
Clamp texture coordinates for spinning cube
BUG=none
TEST=manually run on pixel
R=binji@chromium.org

Review URL: https://codereview.chromium.org/26385002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227383 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227382
SVN changes up to revision 227383