rebaseline.py: add --bugs and --unreviewed flags

tools/tests/rebaseline/output/marked-unreviewed/output-expected/gm-expectations/Test-Win7-ShuttleA-HD2000-x86-Release/expected-results.json

Index: tools/tests/rebaseline/output/marked-unreviewed/output-expected/gm-expectations/Test-Win7-ShuttleA-HD2000-x86-Release/expected-results.json
===================================================================
--- tools/tests/rebaseline/output/marked-unreviewed/output-expected/gm-expectations/Test-Win7-ShuttleA-HD2000-x86-Release/expected-results.json	(revision 0)
+++ tools/tests/rebaseline/output/marked-unreviewed/output-expected/gm-expectations/Test-Win7-ShuttleA-HD2000-x86-Release/expected-results.json	(working copy)
@@ -15,7 +15,12 @@
           11899819492385205974
         ]
       ], 
-      "ignore-failure": false
+      "bugs": [
+        1234, 
+        5678
+      ], 
+      "ignore-failure": false, 
+      "reviewed-by-human": false
     }, 
     "aarectmodes_565.png": {
       "allowed-digests": [
@@ -24,7 +29,12 @@
           14760033689012826769
         ]
       ], 
-      "ignore-failure": false
+      "bugs": [
+        1234, 
+        5678
+      ], 
+      "ignore-failure": false, 
+      "reviewed-by-human": false
     }, 
     "imageblur_565.png": {
       "allowed-digests": [
@@ -33,7 +43,12 @@
           3359963596899141322
         ]
       ], 
-      "ignore-failure": false
+      "bugs": [
+        1234, 
+        5678
+      ], 
+      "ignore-failure": false, 
+      "reviewed-by-human": false
     }, 
     "imageblur_8888.png": {
       "allowed-digests": [
@@ -42,7 +57,12 @@
           4217923806027861152
         ]
       ], 
-      "ignore-failure": false
+      "bugs": [
+        1234, 
+        5678
+      ], 
+      "ignore-failure": false, 
+      "reviewed-by-human": false
     }, 
     "shadertext3_8888.png": {
       "allowed-digests": [
@@ -51,7 +71,12 @@
           3713708307125704716
         ]
       ], 
-      "ignore-failure": false
+      "bugs": [
+        1234, 
+        5678
+      ], 
+      "ignore-failure": false, 
+      "reviewed-by-human": false
     }, 
     "xfermodeimagefilter_pdf.png": {
       "allowed-digests": null, 
@@ -64,7 +89,12 @@
           9151974350149210736
         ]
       ], 
-      "ignore-failure": false
+      "bugs": [
+        1234, 
+        5678
+      ], 
+      "ignore-failure": false, 
+      "reviewed-by-human": false
     }
   }
 }