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

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https://hg.mozilla.org/integration/gaia-central/rev/27ec5ebd50d4
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #13513 from viorelaioia/bug_935915

Bug 935915 - Change test_everything_me_search for a more generic search term

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https://hg.mozilla.org/integration/gaia-central/rev/fe56b7fe7c6c
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 935915 - Change test_everything_me_search for a more generic search termda