Use lessc for building media, if available.
Review Request #3566 — Created Nov. 26, 2012 and submitted
Use lessc for building media, if available. Our media building uses our bless service for compiling .less files to .css. However, this isn't suitable for packaging on RHEL/Fedora/Debian. We now check to see if lessc is available on the system, and use that instead of bless. The packagers can then provide lessc as a build dependency. It also makes for faster building of media.
Tested building with and without lessc. Verified that the appropriate pipeline compiler was being used.