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

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https://hg.mozilla.org/integration/gaia-central/rev/905002bf0771
Author: steveck-chung <schung@mozilla.com>
Desc: Merge pull request #11063 from steveck-chung/bug-891785

Bug 891785 - [MMS] smil.parse doesn't work well if message.attachments is null. r=gnarf

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https://hg.mozilla.org/integration/gaia-central/rev/0a7faef8116b
Author: Steve Chung <schung@mozilla.com>
Desc: Bug 891785 - [MMS] smil.parse doesn't work well if message.attachments is null
Bug 896352 - JavaScript Warning: "reference to undefined property params.interfaceList". r=mrbkap