Stop running image tests on msaa.

Blacklist all image tests on msaa. We do not run them anyway (since
they will not do anything interestingly different from drawing to the
raster backend) - we early exit from Src::draw(), but we still need to
create a render target that matches the size of the image (when not
blacklisted).

Remove the more specific blacklist of a particular image, which is
covered by this one.

BUG=skia:4045

Review URL: https://codereview.chromium.org/1234313006
2 files changed