Bug 1562667 - P4b - Disable jsref test for Atomic on Nightly; r=lth,jorendorff

After enabling the perf for SAB by default on Nightly, some jsreftests fail.
And they all have log like:
tests/test262/shell.js:492: Error: Agents not available item 1

It seems that there are some issues on test262 shell, so the plan of this patch
is to disable these tests and open another follow-up ticket to re-enable them.
So that we could check the impact of enable the perf for SAB without enabling
the functionality of being postMessage'ed on Nightly users.

Differential Revision: https://phabricator.services.mozilla.com/D53966

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

js/src/tests/jstests.list

@@ -132,6 +132,9 @@ skip-if(!xulRuntime.shell) script test262/language/eval-code/indirect/var-env-va
 skip-if(!xulRuntime.shell) script test262/language/global-code/decl-func.js
 skip-if(!xulRuntime.shell) script test262/language/global-code/decl-var.js
 
+# Atomics tests (Atomics/notify, Atomics/wait) are disabled because our $.agent implementation needs getSharedArrayBuffer, setSharedArrayBuffer and evalInWorker: https://bugzilla.mozilla.org/show_bug.cgi?id=1598612
+skip-if(!xulRuntime.shell) include test262/built-ins/Atomics/notify/jstests.list
+skip-if(!xulRuntime.shell) include test262/built-ins/Atomics/wait/jstests.list
 
 ##################################################
 # Test262 tests skipped due to SpiderMonkey bugs #