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

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https://hg.mozilla.org/integration/gaia-central/rev/9404cb57d66c
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #24729 from lightsofapollo/bug-1077167

Bug 1077167 - Correctly ignore autogenerated file r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/500d977b7654
Author: James Lal <james@lightsofapollo.com>
Desc: Bug 1077167 - Correctly ignore autogenerated file r=kgrandon
Bumping manifests a=b2g-bump