Bug 616999 follow-up: update services/sync xpcshell manifest

Bug 648364 removed and bug 613277 added some tests on services-central in the meantime.

services/sync/tests/unit/xpcshell.ini

@@ -2,11 +2,13 @@
 head = head_appinfo.js head_helpers.js head_http_server.js
 tail = 
 
+[test_Observers.js]
+[test_Preferences.js]
 [test_auth_manager.js]
 [test_bookmark_batch_fail.js]
 [test_bookmark_engine.js]
-[test_bookmark_livemarks.js]
 [test_bookmark_legacy_microsummaries_support.js]
+[test_bookmark_livemarks.js]
 [test_bookmark_order.js]
 [test_bookmark_places_query_rewriting.js]
 [test_bookmark_record.js]
@@ -84,10 +86,7 @@ tail =
 [test_utils_hkdfExpand.js]
 [test_utils_isArray.js]
 [test_utils_json.js]
-[test_utils_lazy.js]
-[test_utils_lazy2.js]
 [test_utils_lazyStrings.js]
-[test_utils_lazySvc.js]
 [test_utils_lock.js]
 [test_utils_makeGUID.js]
 [test_utils_makeURI.js]
@@ -99,5 +98,4 @@ tail =
 [test_utils_sha1hmac.js]
 [test_utils_sha256HMAC.js]
 [test_utils_stackTrace.js]
-[test_utils_status.js]
 [test_utils_utf8.js]