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

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https://hg.mozilla.org/integration/gaia-central/rev/47a0aa327ebb
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Merge pull request #24748 from mancas/bug1074643

Bug 1074643 - When we inputted "a"to input box,the contact name display ...

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https://hg.mozilla.org/integration/gaia-central/rev/76b966f8d0f9
Author: Manuel Casas <manuel.casasbarrado@telefonica.com>
Desc: Bug 1074643 - When we inputted "a"to input box,the contact name display incorrectly.
Bumping manifests a=b2g-bump