Bug 1386862: stylo: Turn on the devtools/client/inspector/rules/test/browser_rules_edit-selector_12.js test. r=bholley,jryans

MozReview-Commit-ID: 2hoir7rgybi

--HG--
extra : rebase_source : 1a3c8d48cd52f2facc7a11341ea65f88ece2b64f

devtools/client/inspector/rules/test/browser.ini

@@ -151,7 +151,6 @@ skip-if = os == "mac" # Bug 1245996 : click on scrollbar not working on OSX
 [browser_rules_edit-selector_10.js]
 [browser_rules_edit-selector_11.js]
 [browser_rules_edit-selector_12.js]
-skip-if = stylo && debug # Bug 1386862 - Triggers assertion
 [browser_rules_edit-value-after-name_01.js]
 [browser_rules_edit-value-after-name_02.js]
 [browser_rules_edit-value-after-name_03.js]