Update baselines for Firefox 53.
MODIFY
testing/test-data/base-images.tgz.md5
testing/test-data/base-images.tgz.md5
-f2fa25ac074a409ccc072c3444edfb6f
\ No newline at end of file
+c9987ae6444d8124142e040ae06b7468
\ No newline at end of file

MODIFY
testing/test-data/base-images.tgz.url
testing/test-data/base-images.tgz.url
-https://data.kitware.com/api/v1/file/58c934128d777f0aef5d79a7/download
\ No newline at end of file
+https://data.kitware.com/api/v1/file/590103778d777f16d01e04fb/download
\ No newline at end of file

Update baselines for Firefox 53.