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

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https://hg.mozilla.org/integration/gaia-central/rev/726c4bd403f5
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #19199 from RudyLu/keyboard/Bug1006343-Cannot_enable_layouts

Bug 1006343 - Cannot enable layouts with keyboard setup menu after
r=garychen

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https://hg.mozilla.org/integration/gaia-central/rev/008831e8897b
Author: Rudy Lu <me@rudy.lu>
Desc: Bug 1006343 - Cannot enable layouts with keyboard setup menu after
3rd-party keyboard installation.
 - Should enable keyboard layout with [manifestURL, layoutId].
Bumping manifests a=b2g-bump