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

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https://hg.mozilla.org/integration/gaia-central/rev/4b4d244b83fe
Author: Fernando Jiménez Moreno <ferjmoreno@gmail.com>
Desc: Merge pull request #11096 from ferjm/closedbcalllog

Bug 894926 - [Dialer][Call log] Close DB before deleting it. r=gtorodelv...

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https://hg.mozilla.org/integration/gaia-central/rev/a3f627b7cd55
Author: Fernando Jiménez <ferjmoreno@gmail.com>
Desc: Bug 894926 - [Dialer][Call log] Close DB before deleting it. r=gtorodelvalle