Bug 1641360 - Skip Touch Bar mochitests on non-Mac platforms. r=mikedeboer

Differential Revision: https://phabricator.services.mozilla.com/D77153

browser/components/touchbar/tests/browser/browser.ini

@@ -1,8 +1,10 @@
 [DEFAULT]
+
+[browser_touchbar_searchrestrictions.js]
+skip-if = os != "mac"
+[browser_touchbar_tests.js]
+skip-if = os != "mac"
 support-files =
   readerModeArticle.html
   test-video.mp4
   video_test.html
-
-[browser_touchbar_searchrestrictions.js]
-[browser_touchbar_tests.js]