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

expectations/gm/Test-Ubuntu12-ShuttleA-GTX660-x86-Release/expected-results.json

Index: expectations/gm/Test-Ubuntu12-ShuttleA-GTX660-x86-Release/expected-results.json
diff --git a/expectations/gm/Test-Ubuntu12-ShuttleA-GTX660-x86-Release/expected-results.json b/expectations/gm/Test-Ubuntu12-ShuttleA-GTX660-x86-Release/expected-results.json
index d85a8c998cf182454398ef0a7e7ab918618dd51e..52f344b17f9a1dd55b70131a75c17e97dd3ec9b3 100644
--- a/expectations/gm/Test-Ubuntu12-ShuttleA-GTX660-x86-Release/expected-results.json
+++ b/expectations/gm/Test-Ubuntu12-ShuttleA-GTX660-x86-Release/expected-results.json
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