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

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https://hg.mozilla.org/integration/gaia-central/rev/d811e6819e56
Author: Fernando Campo <fernando.campo@telefonica.com>
Desc: Merge pull request #18535 from fcampo/split-fte-comms-import-999436-2

Bug 999436 - Import services dependencies - 2-utilities (r=jmcf)

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https://hg.mozilla.org/integration/gaia-central/rev/5f255b63cf90
Author: Fernando Campo <fernando.campo@telefonica.com>
Desc: Bug 999436 - Import services dependencies
Part 2: Utilities
Bumping manifests a=b2g-bump