GM: run mode comparisons for all raster configs.

gm/tests/outputs/pipe-playback-failure/output-expected/json-summary.txt

Index: gm/tests/outputs/pipe-playback-failure/output-expected/json-summary.txt
diff --git a/gm/tests/outputs/pipe-playback-failure/output-expected/json-summary.txt b/gm/tests/outputs/pipe-playback-failure/output-expected/json-summary.txt
index c99a8e965156837cacedbf77899083d765056841..ebe8b592b074180965bcff59eb0b85fd00ba43a5 100644
--- a/gm/tests/outputs/pipe-playback-failure/output-expected/json-summary.txt
+++ b/gm/tests/outputs/pipe-playback-failure/output-expected/json-summary.txt
@@ -1,7 +1,8 @@
 {
    "actual-results" : {
       "failed" : {
-         "comparison/selftest1-pipe.png" : [ "bitmap-64bitMD5", 6140979239232854774 ]
+         "565/selftest1-pipe.png" : [ "bitmap-64bitMD5", 6140979239232854774 ],
+         "8888/selftest1-pipe.png" : [ "bitmap-64bitMD5", 6140979239232854774 ]
       },
       "failure-ignored" : null,
       "no-comparison" : null,
@@ -11,19 +12,25 @@
       }
    },
    "expected-results" : {
+      "565/selftest1-pipe.png" : {
+         "allowed-digests" : [
+            [ "bitmap-64bitMD5", 12927999507540085554 ]
+         ],
+         "ignore-failure" : false
+      },
       "565/selftest1.png" : {
          "allowed-digests" : [
             [ "bitmap-64bitMD5", 12927999507540085554 ]
          ],
          "ignore-failure" : false
       },
-      "8888/selftest1.png" : {
+      "8888/selftest1-pipe.png" : {
          "allowed-digests" : [
             [ "bitmap-64bitMD5", 1209453360120438698 ]
          ],
          "ignore-failure" : false
       },
-      "comparison/selftest1-pipe.png" : {
+      "8888/selftest1.png" : {
          "allowed-digests" : [
             [ "bitmap-64bitMD5", 1209453360120438698 ]
          ],