Rebaseline hairline images & remove suppression

expectations/gm/Test-Mac10.6-MacMini4.1-GeForce320M-x86_64-Release/expected-results.json

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
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       "allowed-digests": [
@@ skipping 7625 matching lines @@
       "bugs": [
         476
       ], 
       "ignore-failure": true, 
       "reviewed-by-human": false
     }, 
     "hairlines_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          1563669411226163927
+          17024602512928277966
         ]
       ]
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       "allowed-digests": [
         [
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       "allowed-digests": [
         [
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     }, 
     "hairlines_pdf-mac.png": {
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         [
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       ]
     }, 
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       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           1085590255436271494
         ]
       ], 
@@ skipping 4865 matching lines @@
           10424380103329133154
         ]
       ], 
       "bugs": [
         1578
       ], 
       "reviewed-by-human": false
     }
   }
 }