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

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https://hg.mozilla.org/integration/gaia-central/rev/b9e4a914a18a
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #10345 from crdlc/bug-860992

Bug 860992 - [B2G][Contacts] Time stamp of last contact import is not sh...

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https://hg.mozilla.org/integration/gaia-central/rev/ec99eef7da34
Author: crdlc <crdlc@tid.es>
Desc: Bug 860992 - [B2G][Contacts] Time stamp of last contact import is not shown under Gmail or Hotmail in Contact Settings