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

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https://hg.mozilla.org/integration/gaia-central/rev/7119840c579e
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Merge pull request #15879 from arcturus/bug-966445

Bug 966445 - [Contacts] When viewing contact details as an activity (from Messages for example or Rocketbar), launching email activity doesn't work r=bkelly

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https://hg.mozilla.org/integration/gaia-central/rev/cc71de076fc1
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Bug 966445 - [Contacts] When viewing contact details as an activity (from Messages for example or Rocketbar), launching email activity doesn't work
Bumping manifests a=b2g-bump