Take care of a bunch of pending GPU rebaselines and remove tests from ignored-tests.txt

expectations/gm/Test-Win8-ShuttleA-GTX660-x86_64-Debug/expected-results.json

Index: expectations/gm/Test-Win8-ShuttleA-GTX660-x86_64-Debug/expected-results.json
diff --git a/expectations/gm/Test-Win8-ShuttleA-GTX660-x86_64-Debug/expected-results.json b/expectations/gm/Test-Win8-ShuttleA-GTX660-x86_64-Debug/expected-results.json
index 8b1124a6b6c06d57f9f7c32cd5ef3d0fec6f2c51..47b42bab4c4972678d84da5afef35111e5a3a7d3 100644
--- a/expectations/gm/Test-Win8-ShuttleA-GTX660-x86_64-Debug/expected-results.json
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