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

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https://hg.mozilla.org/integration/gaia-central/rev/543c2840ba4d
Author: Fabien Cazenave <fabien@cazenave.cc>
Desc: Merge pull request #10812 from TheoChevalier/update-fr-master

Bug 890428 - [l10n][fr] Update fr locale on Github for dev testing, r=kaze

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https://hg.mozilla.org/integration/gaia-central/rev/b319cabfea80
Author: TheoChevalier <theo.chevalier11@gmail.com>
Desc: Bug 890428 - [l10n][fr] Update fr locale on Github for dev testing