feat(jsonp): provide a help method to patch jsonp

[JiaLiPassion]

fix angular/angular#7792
provide a helper method to patch jsonp.

Because jsonp has a lot of implementation, so
user need to provide the information to let json send and callback in zone.

sample usage is:

import 'zone.js/dist/zone-patch-jsonp';
Zone['__zone_symbol__jsonp']({
  jsonp: getJSONP,
  sendFuncName: 'send',
 onSuccessFuncName: 'onSuccess',
 onFailedFuncName: 'onFailed'
});

update

now the CI failed because new version jasmine complains, I have pinned the version of jasmine in #994.

[valera-rozuvan]

Demo repository of Zone.js & JSONP: https://github.com/valera-rozuvan/test-zone-js-with-jsonp . Currently Zone.js doesn't work with JSONP. @robdodson can you please get someone to look at this PR? @mhevery any thoughts? Angular will benefit from this PR. Now you have to do custom Change Detection inside angular component if JSONP functionality is used by some 3rd party lib...

[valera-rozuvan]

https://github.com/angular/zone.js/issues/44 also is in this category.

[JiaLiPassion]

Change to WIP to make the success callback factory more flexible. I will update this PR later today.