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

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https://hg.mozilla.org/integration/gaia-central/rev/88b1d8837580
Author: Francisco Borja Salguero Castellano <fbsc@tid.es>
Desc: Merge pull request #10536 from evanxd/bug-880257

Bug 880257 - [MMS] Implement a "Device without SIM" message when attempting to send messages without a SIM card

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https://hg.mozilla.org/integration/gaia-central/rev/0e6dd47508e7
Author: Evan Xd <itoyxd@gmail.com>
Desc: Bug 880257 - Show error messages when send SMS and MMS messages without SIM card, in air plane mode, or with other error.