Update WOFF2 support

[classilla]

First upgrade Brotli
https://bugzilla.mozilla.org/show_bug.cgi?id=1340910
then
https://bugzilla.mozilla.org/show_bug.cgi?id=1384862

[classilla]

There are some minor changes to the Brotli and woff2 endian macros that we should make sure get into future updates.

[classilla]

Tested working.