Bug 1356376: Skip test_ext_i18n.js on Windows debug for frequent intermittent failures. r=me,test-only

MozReview-Commit-ID: 9bIpo3XxXnk

--HG--
extra : rebase_source : 353770064a511f36910e2c0f9c91967ee15d0d02

toolkit/components/extensions/test/xpcshell/xpcshell-content.ini

@@ -1,5 +1,5 @@
 [test_ext_i18n.js]
-skip-if = os == "android"
+skip-if = os == "android" || (os == "win" && debug)
 [test_ext_i18n_css.js]
 [test_ext_contentscript.js]
 [test_ext_contentscript_xrays.js]