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

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

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
@@ skipping 9256 matching lines @@
           "bitmap-64bitMD5", 
           13704381245629684333
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "filterbitmap_image_mandrill_512.png_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          13704381245629684333
+          12617614780925646679
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "filterbitmap_image_mandrill_512.png_8888-pipe cross-process.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           13206855341598955499
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "filterbitmap_image_mandrill_512.png_8888-serialize.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           13206855341598955499
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "filterbitmap_image_mandrill_512.png_8888.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          13206855341598955499
+          9743406049766573166
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "filterbitmap_image_mandrill_512.png_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           17708614393374152687
         ]
@@ skipping 7111 matching lines @@
           "bitmap-64bitMD5", 
           12366755253801250205
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "shadertext2_nvprmsaa4.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          13374125976246952627
+          17518799550679467287
         ]
       ], 
-      "reviewed-by-human": true
+      "bugs": [
+        2619
+      ], 
+      "ignore-failure": true, 
+      "reviewed-by-human": false
     }, 
     "shadertext2_pdf-poppler.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           223777537998895726
         ]
       ], 
       "reviewed-by-human": true
     }, 
@@ skipping 2983 matching lines @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           14883391086059083985
         ]
       ], 
       "reviewed-by-human": true
     }
   }
 }