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