Sval 0.1.0-rc.9: the source of its MPL 2.0 files

Sval is built from Firefox ESR, Mozilla's commit
9aecd40e03ebf6e866e32a0a3001488ed751228d
of https://github.com/mozilla-firefox/firefox.git.

- patches/ holds Sval's changes to Mozilla's files. Apply them to that
  commit with `git apply`, in the order patches/series lists.
- chrome/ holds files Sval adds to Mozilla's tree, at the same paths
  without the leading chrome/.
- branding/sval/ is copied to browser/branding/sval/.
- packaging/linux/ holds the templates of the .deb and .rpm packages.

Each file is under the Mozilla Public License 2.0, in LICENSES/MPL-2.0.txt.
