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

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https://hg.mozilla.org/integration/gaia-central/rev/c64d57393745
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #19666 from gitmai/bug-1016146-white-layer-contacts-dialer

Bug 1016146 - [Contacts] Open from Dialer, a white layer shown and block...

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https://hg.mozilla.org/integration/gaia-central/rev/acda8974d373
Author: mai <mri@tid.es>
Desc: Bug 1016146 - [Contacts] Open from Dialer, a white layer shown and blocking the search results
Bumping manifests a=b2g-bump