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

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https://hg.mozilla.org/integration/gaia-central/rev/ebab79baaee5
Author: Fernando Campo <fernando.campo@o2.com>
Desc: Merge pull request #13228 from fcampo/export-retry-928990

Bug 928990 - Retry on export error takes to wrong screen (r=bkelly)

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https://hg.mozilla.org/integration/gaia-central/rev/0223eec48f79
Author: Fernando Campo <fernando.campo@o2.com>
Desc: Bug 928990 - Retry on export error takes to wrong screen