Bug 1556632 - Increase the intermittent leak threshold for all wpt tests on OSX to 2100 bytes to allow for new fields to be added to OriginAttributes; r=mccr8

Differential Revision: https://phabricator.services.mozilla.com/D39023

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

testing/web-platform/meta/__dir__.ini

@@ -1,6 +1,6 @@
 lsan-allowed: [alloc::alloc::alloc, alloc::alloc::realloc, js_pod_malloc, js_pod_calloc, js_pod_realloc, js_arena_calloc,js_pod_arena_calloc, maybe_pod_calloc, pod_calloc, make_zeroed_pod_array, js_arena_malloc, js_arena_realloc, CompileUtf8]
 leak-threshold:
   if webrender: [tab:10000, gpu: 10000, gmplugin:20000, default:16000]
-  if (os == "mac"): [tab:10000, gmplugin:20000, default:2000, rdd:400]
+  if (os == "mac"): [tab:10000, gmplugin:20000, default:2100, rdd:400]
   [tab:10000, gmplugin:20000, rdd:400]