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

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https://hg.mozilla.org/integration/gaia-central/rev/c037df866397
Author: Ghislain 'Aus' Lacroix <aus@noiseport.org>
Desc: Merge pull request #21913 from nullaus/bug1038167

bug 1038167 - Update icons for Find My Device, Vertical Homescreen, Smar...

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https://hg.mozilla.org/integration/gaia-central/rev/9e855ac9b8ec
Author: Ghislain 'Aus' Lacroix <aus@mozilla.com>
Desc: bug 1038167 - Update icons for Find My Device, Vertical Homescreen, Smart Collection and System App
Bumping manifests a=b2g-bump