Bug 1167933 - Intermittent e10s browser_async_flushes.js- disable on debug. r=mikedeboer

MozReview-Commit-ID: 357NSaMFLqc

browser/components/sessionstore/test/browser.ini

@@ -70,6 +70,7 @@ support-files =
 [browser_async_duplicate_tab.js]
 [browser_async_flushes.js]
 run-if = e10s && crashreporter
+skip-if = debug # bug 1167933
 [browser_async_remove_tab.js]
 run-if = e10s
 [browser_attributes.js]