Rebaseline hairline images & remove suppression

expectations/gm/Test-Mac10.7-MacMini4.1-GeForce320M-x86-Debug/expected-results.json

 {
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   "expected-results": {
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       "allowed-digests": [
@@ skipping 9574 matching lines @@
       ], 
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       ], 
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       ], 
@@ skipping 5792 matching lines @@
           10424380103329133154
         ]
       ], 
       "bugs": [
         1578
       ], 
       "reviewed-by-human": false
     }
   }
 }