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

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https://hg.mozilla.org/integration/gaia-central/rev/0c0da681fe77
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #25466 from KevinGrandon/bug_1048991_add_integration_test

Bug 1048991 - [Search] Add home button marionette test

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https://hg.mozilla.org/integration/gaia-central/rev/677c59ccd3b7
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1048991 - [Search] Add home button marionette test r=daleharvey
Bumping manifests a=b2g-bump