Bug 1549985 - disabled browser_tabCloseSpacer.js on Linux64 debug and asan r=jmaher

Differential Revision: https://phabricator.services.mozilla.com/D38379

--HG--
extra : moz-landing-system : lando

browser/base/content/test/tabs/browser.ini

@@ -86,6 +86,7 @@ skip-if = (verify && (os == 'win' || os == 'mac'))
 [browser_reload_deleted_file.js]
 skip-if = (debug && os == 'mac') || (debug && os == 'linux' && bits == 64) #Bug 1421183, disabled on Linux/OSX for leaked windows
 [browser_tabCloseSpacer.js]
+skip-if = (debug && os == 'linux' && bits == 64) || (asan && os == 'linux' && bits == 64) #Bug 1549985
 [browser_tab_a11y_description.js]
 [browser_tab_label_during_reload.js]
 [browser_tabCloseProbes.js]