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

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https://hg.mozilla.org/integration/gaia-central/rev/7e1f70152cc5
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Merge pull request #13026 from Rik/license-929926

Bug 929926 - LICENCE is mis-spelled r=gerv

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https://hg.mozilla.org/integration/gaia-central/rev/fd5e9e9a462e
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Bug 929926 - LICENCE is mis-spelled