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

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https://hg.mozilla.org/integration/gaia-central/rev/ffd04882bee5
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #25789 from crh0716/1088468

Bug 1088468 - Clear the apn selection cache when the field in settings db is cleared r=eragonj

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https://hg.mozilla.org/integration/gaia-central/rev/6630f3d6d3f4
Author: Arthur Chen <crh0716@gmail.com>
Desc: Bug 1088468 - Clear the apn selection cache when the field in settings db is cleared
Bumping manifests a=b2g-bump