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

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https://hg.mozilla.org/integration/gaia-central/rev/72ea3fb768ea
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #28715 from cctuan/1141001

Bug 1141001 - Diff between RUN_ON_NODE=1 and normal is different in settings.json

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https://hg.mozilla.org/integration/gaia-central/rev/8ecbb42c665b
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 1141001 - correct datauri type for getFileAsDataURI

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "dcb2595f74448f22748ca86e22865f0556d858dd", 
+        "git_revision": "89c73d6dce3186a4244a506ce23ea6e891771a39", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "e5ed656c9741f5c8a7d8efe38ab3985f35b6128c", 
+    "revision": "72ea3fb768ea3fa181aa9acaa7bb8cbfc06bc3f1", 
     "repo_path": "integration/gaia-central"
 }