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

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https://hg.mozilla.org/integration/gaia-central/rev/6351c94ef82b
Author: Jim Porter <squibblyflabbetydoo@gmail.com>
Desc: Merge pull request #10332 from mozsquib/settings-storage-name

Bug 880059 - External SD card storage listed as "internal" in Settings

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https://hg.mozilla.org/integration/gaia-central/rev/24904623863a
Author: Jim Porter <jporter@mozilla.com>
Desc: Bug 880059 - External SD card storage listed as "internal" in Settings; r=dhylands