This bumps the underlying version of node-sass to 3.4.0 and libsass to 3.3.0. It causes no difference in the current sass output. Props netweb. See #34177. Built from https://develop.svn.wordpress.org/trunk@35539 git-svn-id: http://core.svn.wordpress.org/trunk@35503 1a063a9b-81f0-0310-95a4-ce76da25c4cd