Rebaseline shadertext2_{gpu,8888} after SkPaint::measureText changes

expectations/gm/Test-Win7-ShuttleA-HD2000-x86-Release/expected-results.json

 {
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           9785004568147979273
         ]
       ], 
       "bugs": [
@@ skipping 10718 matching lines @@
       ], 
       "bugs": [
         2146
       ], 
       "reviewed-by-human": false
     }, 
     "shadertext2_8888.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          16902688729666742253
+          11639199802079850719
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "shadertext2_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          9020409907521243523
+          15716854445125634523
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "shadertext2_pdf-poppler.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           7181472333340669889
         ]
@@ skipping 1975 matching lines @@
           15843716056234692659
         ]
       ], 
       "bugs": [
         2146
       ], 
       "reviewed-by-human": false
     }
   }
 }