Mark remaining Ubuntu msaa shadertext2 images as ignore-failure.

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

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
@@ skipping 16278 matching lines @@
       "ignore-failure": true, 
       "reviewed-by-human": false
     }, 
     "shadertext2_nvprmsaa4.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           13374125976246952627
         ]
       ], 
+      "bugs": [
+        2619
+      ], 
+      "ignore-failure": true, 
       "reviewed-by-human": true
     }, 
     "shadertext2_pdf-poppler.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           223777537998895726
         ]
       ], 
       "reviewed-by-human": true
@@ skipping 2993 matching lines @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           14883391086059083985
         ]
       ], 
       "reviewed-by-human": true
     }
   }
 }