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

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https://hg.mozilla.org/integration/gaia-central/rev/b111cfaf65c6
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #17800 from KevinGrandon/bug_989916_captive_portal_test_sandboxing

Bug 989916 - [System] Fix captive_portal_test.js when run in its own sandbox

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https://hg.mozilla.org/integration/gaia-central/rev/befac97a124e
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 989916 - [System] Fix captive_portal_test.js when run in its own sandbox r=me
Bumping manifests a=b2g-bump