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

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https://hg.mozilla.org/integration/gaia-central/rev/6a113da9e00f
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #26925 from KevinGrandon/bug_1113904_add_editorconfig

Bug 1113904 - Introduce gaia .editorconfig

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https://hg.mozilla.org/integration/gaia-central/rev/9c0dabfbd68e
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1113904 - Introduce gaia .editorconfig r=justindarc
Bumping manifests a=b2g-bump