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

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https://hg.mozilla.org/integration/gaia-central/rev/e4bca7510b6a
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #11949 from jmcanterafonseca/bug-907127

Bug 907127 - [zffos1.1][Contacts][Import from Gmail] Not able to import ...

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https://hg.mozilla.org/integration/gaia-central/rev/381344c20b01
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 907127 - [zffos1.1][Contacts][Import from Gmail] Not able to import huge number of contacts