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

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https://hg.mozilla.org/integration/gaia-central/rev/d25390120160
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Merge pull request #17004 from EverythingMe/968918-revert-collection-icon

Bug 968918 - [B2G][Everything.me][Smart Collections] Revert to Default I...

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https://hg.mozilla.org/integration/gaia-central/rev/76fd2efb6085
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Bug 968918 - [B2G][Everything.me][Smart Collections] Revert to Default Icon [r=ranbena]
Bumping manifests a=b2g-bump