Fix run_decoding_tests on xoom.

Builder Test-Android-Xoom-Tegra2-Arm7-Debug fails run_decoding_tests
due to a couple of images. Add a way in skimage to ignore failures
if an image is expected to fail. Add an expectations file for xoom
that includes ignore-failure for the two files which are failing.

I have created https://code.google.com/p/skia/issues/detail?id=1382
to track the fact that these images fail to decode, despite the bot
showing green.

R=borenet@google.com

Review URL: https://codereview.chromium.org/18023008

git-svn-id: http://skia.googlecode.com/svn/trunk@9797 2bbb7eff-a529-9590-31e7-b0007b416f81
2 files changed