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

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https://hg.mozilla.org/integration/gaia-central/rev/1427918430cc
Author: chirarobert <robert.chira@softvision.ro>
Desc: Merge pull request #26657 from JohanLorenzo/bug-1108534

Bug 1108534 - test_delete_call_log should use a hard-coded phone, not re...

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https://hg.mozilla.org/integration/gaia-central/rev/52da9928def6
Author: Johan Lorenzo <jlorenzo@mozilla.com>
Desc: Bug 1108534 - test_delete_call_log should use a hard-coded phone, not remote_phone_number
Bumping manifests a=b2g-bump