Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/c3f49654e52f
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Revert "Bug 990028 - [Home2] App and Bookmark Icon Deletion follow-up r=me"

This reverts commit 4522835e89d8e1ef4bf99b9981e25980da147cf7.

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https://hg.mozilla.org/integration/gaia-central/rev/d746d4e89c97
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Revert "Bug 990028 - [Home2] App and Bookmark Icon Deletion r=me"

This reverts commit ca49e1f8d8c1feab8ae5dab1fd96eef38d77ea5f.

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https://hg.mozilla.org/integration/gaia-central/rev/a86fcbfe03c3
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 990028 - [Home2] App and Bookmark Icon Deletion follow-up r=me
Bumping manifests a=b2g-bump