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

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https://hg.mozilla.org/integration/gaia-central/rev/997edf205396
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #14034 from askeing/942720

Bug 942720 - Fix test_settings_airplane_mode.py

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https://hg.mozilla.org/integration/gaia-central/rev/a315b88df72d
Author: askeing <askeing@gmail.com>
Desc: Bug 942720 - Fix test_settings_airplane_mode.py