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

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https://hg.mozilla.org/integration/gaia-central/rev/f80ab3f538a7
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #22066 from KevinGrandon/bug_1042563_homescreen_performance_startup

Bug 1042563 - [Homescreen] Implement performance startup events

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https://hg.mozilla.org/integration/gaia-central/rev/d8003d636c2f
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1042563 - [Homescreen] Implement performance startup events r=eperelman
Bumping manifests a=b2g-bump