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

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https://hg.mozilla.org/integration/gaia-central/rev/2acb7f1e2b3e
Author: evelynhung <jj.evelyn@gmail.com>
Desc: Merge pull request #14349 from evelynhung/issue-937514

Bug 937514 - fix a wrong variable reference.

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https://hg.mozilla.org/integration/gaia-central/rev/c626e5f4f22b
Author: Evelyn Hung <jj.evelyn@gmail.com>
Desc: Bug 937514 - fix a wrong variable reference.