Rebaseline stragglers, mark shadertext2 as ignore on ubunutu for msaa configs.

expectations/gm/Test-Ubuntu12-ShuttleA-GTX660-x86_64-Debug/expected-results.json

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
@@ skipping 16499 matching lines @@
           "bitmap-64bitMD5", 
           9290689085471276179
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "shadertext2_nvprmsaa4.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          9062092996596322126
+          4702027525692342270
         ]
       ], 
-      "reviewed-by-human": true
+      "bugs": [
+        2619
+      ], 
+      "ignore-failure": true, 
+      "reviewed-by-human": false
     }, 
     "shadertext2_pdf-poppler.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           387202918560141756
         ]
       ], 
       "reviewed-by-human": true
     }, 
@@ skipping 3035 matching lines @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           14883391086059083985
         ]
       ], 
       "reviewed-by-human": true
     }
   }
 }