Bug 1544493: Add ntdll to libxul OS_LIBS; r=mhowell

Differential Revision: https://phabricator.services.mozilla.com/D27542

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

toolkit/library/moz.build

@@ -192,6 +192,7 @@ if CONFIG['OS_ARCH'] == 'WINNT':
     OS_LIBS += [
         'crypt32',
         'shell32',
+        'ntdll',
         'ole32',
         'version',
         'winspool',