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

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https://hg.mozilla.org/integration/gaia-central/rev/18aff5522315
Author: Fernando Jiménez Moreno <ferjmoreno@gmail.com>
Desc: Merge pull request #11042 from ferjm/tmpcalllog

Bug 862385 - Cache contact names for the call log. r=etienne,gtorodelval...

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https://hg.mozilla.org/integration/gaia-central/rev/4e77089861fc
Author: Fernando Jiménez <ferjmoreno@gmail.com>
Desc: Bug 862385 - Cache contact names for the call log. r=etienne,gtorodelvalle