Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/d669a5d0b091
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Merge pull request #25149 from arcturus/bug-1075770

Bug 1075770 - [Contacts] Lots of tests depends on the mozContacts API r=jmcf

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https://hg.mozilla.org/integration/gaia-central/rev/7db84844d8e4
Author: Francisco Jordano <fjordano@mozilla.com>
Desc: Bug 1075770 - [Contacts] Lots of tests depends on the mozContacts API

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https://hg.mozilla.org/integration/gaia-central/rev/8217c5c0e774
Author: Sergi Mansilla <sergi.mansilla@gmail.com>
Desc: Merge pull request #25490 from sergi/BUG_1086674

Bug 1086674 - [2.1][l10n][Contacts] Multiple locales: The 'Add Picture' string is truncated on 'Add contact' screen. [r=francisco]

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https://hg.mozilla.org/integration/gaia-central/rev/f88c682999ac
Author: Sergi Mansilla <sergi.mansilla@gmail.com>
Desc: Bug 1086674 - [2.1][l10n][Contacts] Multiple locales: The 'Add Picture' string is truncated on 'Add contact' screen.
Bumping manifests a=b2g-bump