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

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https://hg.mozilla.org/integration/gaia-central/rev/8e0e124fdbb6
Author: Fabien Cazenave <fabien@cazenave.cc>
Desc: Merge pull request #14490 from TheoChevalier/merge-test-locales-1.3

Bug 947739 - [l10n][1.3] Merge test locales in Github for developer

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https://hg.mozilla.org/integration/gaia-central/rev/e536e6d23afc
Author: TheoChevalier <theo.chevalier11@gmail.com>
Desc: Bug 947739 - [l10n][1.3] Merge test locales in Github for developer