We use a drop-in replacement for the SVGPathSeg and SVGPathSegList
APIs that were removed from SVG2. Unfortunately the embedded version
of this polyfill doesn't work anymore with Firefox 59 and later.

It has been needed to adapt a new version of the same polyfill.
(See https://github.com/progers/pathseg)

Change-Id: Ib5208d67022e585b7a5fb24e37cc446f50e57ee3
(cherry picked from commit 1b2aedb7b9f81bb6b43b64559cab00956c189f82)