Third round of matrixconvolution rebaselines, and removal from ignored-tests.txt.

expectations/gm/Test-ChromeOS-Daisy-MaliT604-Arm7-Release/expected-results.json

 {
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           12831071530564277917
         ]
       ], 
       "bugs": [
@@ skipping 4130 matching lines @@
       ], 
       "bugs": [
         1578
       ], 
       "reviewed-by-human": false
     }, 
     "matrixconvolution_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          12412864253794235334
+          17681274672761086257
         ]
       ], 
       "bugs": [
         1578
       ], 
       "reviewed-by-human": false
     }, 
     "matrixconvolution_8888.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          13439345044157482892
+          10222071295493882388
         ]
       ], 
       "bugs": [
         1578
       ], 
       "reviewed-by-human": false
     }, 
     "megalooper_0x0_565.png": {
       "allowed-digests": [
         [
@@ skipping 1921 matching lines @@
           9464173494277460873
         ]
       ], 
       "bugs": [
         1578
       ], 
       "reviewed-by-human": false
     }
   }
 }