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

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

Index: expectations/gm/Test-Ubuntu12-ShuttleA-GTX660-x86-Debug/expected-results.json
diff --git a/expectations/gm/Test-Ubuntu12-ShuttleA-GTX660-x86-Debug/expected-results.json b/expectations/gm/Test-Ubuntu12-ShuttleA-GTX660-x86-Debug/expected-results.json
index ff311e0bfd132332017a7614c93c5bdef3d024b3..5a6d4efe1b3389700aa76c8fdcc3c63471bbe219 100644
--- a/expectations/gm/Test-Ubuntu12-ShuttleA-GTX660-x86-Debug/expected-results.json
+++ b/expectations/gm/Test-Ubuntu12-ShuttleA-GTX660-x86-Debug/expected-results.json
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