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

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https://hg.mozilla.org/integration/gaia-central/rev/7245fa317b2a
Author: evelynhung <jj.evelyn@gmail.com>
Desc: Merge pull request #13850 from svic/rebase-master-41c3fd86-SettingsUI

Bug 866907: Settings UI Implementation, r=evelyn

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https://hg.mozilla.org/integration/gaia-central/rev/e6c4b3243986
Author: Garner Lee <garner.lee@telekom.com>
Desc: Bug 866907: Settings UI Implementation.

- NFC UI enable/disable
- Airplane mode implementation.