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

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https://hg.mozilla.org/integration/gaia-central/rev/f22dfe27fc55
Author: albertopq <albert.pastor@gmail.com>
Desc: Merge pull request #24426 from albertopq/1071706-dark-lockscreen

Bug 1071706 - Dark icons on lockscreen r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/2561dfec3e78
Author: albertopq <apastor@mozilla.com>
Desc: Bug 1071706 - Dark icons on lockscreen
Bumping manifests a=b2g-bump