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_64-Release/expected-results.json

 {
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   }, 
   "expected-results": {
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       "allowed-digests": [
@@ skipping 6226 matching lines @@
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+          6481939352948074473
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@@ skipping 204 matching lines @@
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       "allowed-digests": [
         [
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         [
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         ]
@@ skipping 252 matching lines @@
       ], 
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     "downsamplebitmap_text_high_72.00pt_gpu.png": {
       "allowed-digests": [
         [
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     "downsamplebitmap_text_high_72.00pt_pdf-mac.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           12176664247208500993
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@@ skipping 918 matching lines @@
           "bitmap-64bitMD5", 
           17431832542123652511
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       "reviewed-by-human": true
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     "filterbitmap_checkerboard_192_192_gpu.png": {
       "allowed-digests": [
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+          8442978142037036312
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       "reviewed-by-human": true
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     "filterbitmap_checkerboard_192_192_pdf-mac.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           17709234466906542744
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@@ skipping 8696 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", 
           5541447607866535516
         ]
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       "reviewed-by-human": false
     }, 
@@ skipping 484 matching lines @@
           7829854837061118142
         ]
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       "bugs": [
         1578
       ], 
       "reviewed-by-human": false
     }
   }
 }