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

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https://hg.mozilla.org/integration/gaia-central/rev/22f5594ac423
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Merge pull request #16570 from EverythingMe/973864-set-wallpaper

Bug 973864 - [Everything.me] Set Collection background image as wallpape...

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https://hg.mozilla.org/integration/gaia-central/rev/f6b32b244ab3
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Bug 973864 - [Everything.me] Set Collection background image as wallpaper only works on first tap [r=ranbena]
Bumping manifests a=b2g-bump