Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/267abffef80e
Author: Rex KM Lee <rexboy@mozilla.com>
Desc: Merge pull request #11774 from rexboy7/fix-bug905461

Bug 905461 - [Settings] Accept IP addresses with padding zero in custom ...

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https://hg.mozilla.org/integration/gaia-central/rev/ece53a455baa
Author: Rex Lee <rexboy@mozilla.com>
Desc: Bug 905461 - [Settings] Accept IP addresses with padding zero in custom APN settings