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

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https://hg.mozilla.org/integration/gaia-central/rev/34400b2a19b4
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #24055 from jmcanterafonseca/fix_deferred

Bug 1067303 - [Contacts] deferred actions / migrator is not working. err...

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https://hg.mozilla.org/integration/gaia-central/rev/94eb1ed2c432
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 1067303 - [Contacts] deferred actions / migrator is not working. errors in console are found
Bumping manifests a=b2g-bump