gecko/modules/brotli

This is the Brotli data compression library from
https://code.google.com/p/font-compression-reference/.

Currently, we import only the Brotli decoder (the /dec/ subdirectory), not the
encoder (/enc/ subdirectory).

Upstream code can be viewed at
  https://code.google.com/p/font-compression-reference/source/browse/#git%2Fbrotli%2Fdec

and cloned by
  git clone https://code.google.com/p/font-compression-reference/ 

The in-tree copy is updated by running
  sh update.sh
from within the modules/brotli directory.

Current version: [commit d9a74803fa884559879e3205cfe6f257a2d85519].