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

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https://hg.mozilla.org/integration/gaia-central/rev/a367af01c182
Author: Wilson Page <wilsonpage@me.com>
Desc: Merge pull request #19834 from yor-mozilla-com/gaia-subheader-remove-data

Bug 1018367 - [gaia-subheader] Remove "data-" prefix on component attrib...

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https://hg.mozilla.org/integration/gaia-central/rev/7e62994d8b82
Author: Yan Or <yor@mozilla.com>
Desc: Bug 1018367 - [gaia-subheader] Remove "data-" prefix on component attributes
Bumping manifests a=b2g-bump