Bug 1605297 - disable browser_policyOverride.js for frequent failures. r=jmaher

Differential Revision: https://phabricator.services.mozilla.com/D58421

--HG--
extra : moz-landing-system : lando

browser/extensions/doh-rollout/test/browser/browser.ini

@@ -6,4 +6,5 @@ skip-if = debug # Bug 1548006 - reloading an addon upsets the leak checker.
 [browser_dirtyEnable.js]
 [browser_doorhangerUserReject.js]
 [browser_policyOverride.js]
+skip-if = (!debug && bits == 64) #Bug 1605297
 [browser_userInterference.js]