Rebaseline textblobshader expectation for nvpr

Rebaseline after https://codereview.chromium.org/712223002. The
difference is a result of using different bounding boxes to cover
gradient fills, which caused a few pixels do differ by a value of one.

BUG=skia:

Review URL: https://codereview.chromium.org/746603002
Adding GeometryData object

BUG=skia:

Review URL: https://codereview.chromium.org/745663002