Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/6dbfaf37e8ce
Author: Johan Lorenzo <jlorenzo@mozilla.com>
Desc: Merge pull request #33529 from edmorley/rm-gaiatest-treeherder-submission

Bug 1230244 - gaiatest: Remove unused Treeherder submission code

========

https://hg.mozilla.org/integration/gaia-central/rev/187c9cb924ca
Author: Ed Morley <emorley@mozilla.com>
Desc: Bug 1230244 - gaiatest: Remove unused Treeherder submission code

Results are now posted to Treeherder using Taskcluster instead. The
existing code is broken and/or using deprecated features so is best
removed to avoid confusion.

The boto package is also unused after the removal of treeherder.py.

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "6fefc3a037c834423e0c4c79655341a881d1247c", 
+        "git_revision": "961528f4391668bc89ec0be14fa367cea099b588", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "f4014d0673423623dda8aa5df834104786d5fe69", 
+    "revision": "6dbfaf37e8ce0fa2017b228aacfc8587850ae00f", 
     "repo_path": "integration/gaia-central"
 }