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

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https://hg.mozilla.org/integration/gaia-central/rev/4a3f02dbc339
Author: Ian Liu <iliu@mozilla.com>
Desc: Merge pull request #13372 from ian-liu/bluetooth/Bug922993_Refine_the_description_of_header/body_while_the_storage_is_not_available

Bug 922993 - [Bluetooth] Refine the description of header/body while the storage is not available, r=@alivedise

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https://hg.mozilla.org/integration/gaia-central/rev/2e110e34e7ff
Author: ian-liu <iliu@mozilla.com>
Desc: Bug 922993 - [Bluetooth] Refine the description of header/body while the storage is not available

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "66fdc19a47de99173cfd098774f1ea1d4a856dc3", 
+    "revision": "4a3f02dbc339012f5f595b8180f54adf5cb08713", 
     "repo_path": "/integration/gaia-central"
 }