[Gardening] Rebaseline text-align-08-b.svg results.

TBR=pdr@chromium.org
BUG=263742

Review URL: https://codereview.chromium.org/22269004

git-svn-id: svn://svn.chromium.org/blink/trunk@155713 bbb929c8-8fbe-4397-9dbb-9b2b20218538