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

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

Index: expectations/gm/Test-Win8-ShuttleA-GTX660-x86_64-Release/expected-results.json
diff --git a/expectations/gm/Test-Win8-ShuttleA-GTX660-x86_64-Release/expected-results.json b/expectations/gm/Test-Win8-ShuttleA-GTX660-x86_64-Release/expected-results.json
index 46ffe93d45a68b788d0e07f22b0f3d65870f559e..b168ed4b0c9295121f3a2814fd6967ce66b87458 100644
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