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

expectations/gm/Test-Mac10.8-MacMini4.1-GeForce320M-x86-Release/expected-results.json

 {
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   "expected-results": {
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@@ skipping 5899 matching lines @@
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+          6481939352948074473
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@@ skipping 180 matching lines @@
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       "allowed-digests": [
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       "allowed-digests": [
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         ]
@@ skipping 168 matching lines @@
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     "downsamplebitmap_text_high_72.00pt_gpu.png": {
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         [
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     "downsamplebitmap_text_high_72.00pt_pdf-mac.png": {
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         [
           "bitmap-64bitMD5", 
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@@ skipping 811 matching lines @@
           "bitmap-64bitMD5", 
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       "reviewed-by-human": true
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     "filterbitmap_checkerboard_192_192_gpu.png": {
       "allowed-digests": [
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       "reviewed-by-human": true
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     "filterbitmap_checkerboard_192_192_pdf-mac.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           16644974874061458792
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@@ skipping 7754 matching lines @@
           "bitmap-64bitMD5", 
           5226204384509634475
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     "vertices_80_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          15378416112190717089
+          1238935355949663480
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-      "reviewed-by-human": false
+      "reviewed-by-human": true
     }, 
     "vertices_80_pdf-mac.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
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       "reviewed-by-human": false
     }, 
@@ skipping 379 matching lines @@
           7829854837061118142
         ]
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       "bugs": [
         1578
       ], 
       "reviewed-by-human": false
     }
   }
 }