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

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https://hg.mozilla.org/integration/gaia-central/rev/e44920cf811a
Author: lissyx <lissyx+github@lissyx.dyndns.org>
Desc: Merge pull request #15018 from lissyx/bug956074

Bug 956074 - Provide unlockingStart() and unlockingStop() for Dialer r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/5ab51b69872e
Author: Alexandre Lissy <lissyx+github@lissyx.dyndns.org>
Desc: Bug 956074 - Provide unlockingStart() and unlockingStop() for Dialer