Bug 1624396 - add necessary trigonometry intrinsics for conic gradien…
…ts in SWGL. r=jrmuizel Depends on D67960 Differential Revision: https://phabricator.services.mozilla.com/D67961 [ghsync] From https://hg.mozilla.org/mozilla-central/rev/a6414fe1b3ecc526b2c524ae13a00467264bb07b