Update LESS_BINARY and add BABEL_BINARY to cope with no symlinks.

Review Request #7994 — Created Feb. 24, 2016 and submitted — Latest diff uploaded

Information

Review Board
release-2.6.x
2aefe17...

Reviewers

Vagrant on windows has issues creating symlinks, especially from within
npm install. It's possible to use npm install --no-bin-links, but then
things are not included in node_modules/.bin.

This change explicitly references the right scripts inside the less and
babel-cli modules.

Verified that compilation still worked.