Update svg/animations/animate-text-nested-transforms.html after r177774

Update svg/animations/animate-text-nested-transforms.html after r177774
https://bugs.webkit.org/show_bug.cgi?id=141686

Reviewed by Andreas Kling.

Text metrics are expected to change.

* platform/mac/TestExpectations:
* svg/animations/animate-text-nested-transforms-expected.txt:
* svg/animations/script-tests/animate-text-nested-transforms.js:
(text.appendChild.rootSVGElement.appendChild.startSample):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@180219 268f45cc-cd09-0410-ab3c-d52691b4dbfc