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

expectations/gm/Test-Win8-ShuttleA-GTX660-x86-Debug/expected-results.json

Index: expectations/gm/Test-Win8-ShuttleA-GTX660-x86-Debug/expected-results.json
diff --git a/expectations/gm/Test-Win8-ShuttleA-GTX660-x86-Debug/expected-results.json b/expectations/gm/Test-Win8-ShuttleA-GTX660-x86-Debug/expected-results.json
index a60237baec9e8567c313f0edcf21606980efa486..69fb94f0f38af164c0ac40f31954a9383f36b119 100644
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