Bug 1774419 - fix loading-dial.svg to not ship outside of Nightly, r=sfoster

Differential Revision: https://phabricator.services.mozilla.com/D149402

toolkit/themes/shared/desktop-jar.inc.mn

@@ -77,7 +77,9 @@
   skin/classic/global/icons/link.svg                       (../../shared/icons/link.svg)
   skin/classic/global/icons/loading.png                    (../../shared/icons/loading.png)
   skin/classic/global/icons/loading@2x.png                 (../../shared/icons/loading@2x.png)
+#ifdef NIGHTLY_BUILD
   skin/classic/global/icons/loading-dial.svg               (../../shared/icons/loading-dial.svg)
+#endif
   skin/classic/global/icons/more.svg                       (../../shared/icons/more.svg)
   skin/classic/global/icons/open-in-new.svg                (../../shared/icons/open-in-new.svg)
   skin/classic/global/icons/page-portrait.svg              (../../shared/icons/page-portrait.svg)