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

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https://hg.mozilla.org/integration/gaia-central/rev/f9a4193e82db
Author: autolander <bug.autolander@gmail.com>
Desc: Bug 1026967 - merge pull request #29461 from jrburke:bug1026967-email-delete-draft to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/56e93707e7b6
Author: jrburke <jrburke@gmail.com>
Desc: Bug 1026967 - [email] Change Discard Draft string to Delete the Draft to clarify that the draft will be deleted rather than just changes since last explicit save discarded

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "130079ebdb3821275c2e5d5152a70686e2dd133b", 
+        "git_revision": "c8cb0c0ebb8dd1f5c0c9037e38f8e4b237beb77b", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "d3ed096fafa59ef6e3c1fcba493855305fc5a40c", 
+    "revision": "f9a4193e82db33f7717a939b769b0b90975231fe", 
     "repo_path": "integration/gaia-central"
 }