Update test cases for change r206465.

Update test cases for change r206465.
https://bugs.webkit.org/show_bug.cgi?id=163618

Reviewed by Ryosuke Niwa.

Update test case for change r206465 which added support for multiple summary pages.
Use deepStrictEqual instead of deepEqual as deepEqual will not complain in the case like 'deepEqual([],{})'.
Fix a test failure in tools-buildbot-triggerable-tests.js.
Fix a bug in generating manifest.

* config.json:
* public/include/manifest.php:
* server-tests/api-manifest.js:
(TestServer.remoteAPI.getJSON.string_appeared_here.then):
* server-tests/tools-buildbot-triggerable-tests.js:
(then):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@207492 268f45cc-cd09-0410-ab3c-d52691b4dbfc