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

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https://hg.mozilla.org/integration/gaia-central/rev/6dfa8ec45d74
Author: Fernando Jiménez Moreno <ferjmoreno@gmail.com>
Desc: Merge pull request #21619 from willyaranda/bug1033318

Bug 1033318. Show a country list, with a prefix hint. r=ferjm

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https://hg.mozilla.org/integration/gaia-central/rev/e56c6f9d3e2b
Author: Guillermo López <willyaranda@gmail.com>
Desc: Bug 1033318. Show a country list, with a prefix hint
Bumping manifests a=b2g-bump