rebaseline medium quality downscale images after mipmap change

expectations/gm/Test-Android-Xoom-Tegra2-Arm7-Debug/expected-results.json

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
@@ skipping 3346 matching lines @@
       ], 
       "bugs": [
         1759
       ], 
       "reviewed-by-human": false
     }, 
     "downsamplebitmap_image_medium_mandrill_512.png_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          9579743923378926908
+          12594265632012724270
         ]
       ], 
-      "bugs": [
-        1759
-      ], 
-      "reviewed-by-human": false
+      "reviewed-by-human": true
     }, 
     "downsamplebitmap_image_none_mandrill_512.png_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           15018591777914911277
         ]
       ], 
       "bugs": [
         1759
@@ skipping 4676 matching lines @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           1704058947413277228
         ]
       ], 
       "ignore-failure": false
     }
   }
 }