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

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

Index: expectations/gm/Test-Win8-ShuttleA-GTX660-x86-Release/expected-results.json
diff --git a/expectations/gm/Test-Win8-ShuttleA-GTX660-x86-Release/expected-results.json b/expectations/gm/Test-Win8-ShuttleA-GTX660-x86-Release/expected-results.json
index b1f99558620ccb3a19f9401985bb9fbc174467ca..b5da5def3a516ed2e1dd517033b2f8d65e1fe179 100644
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