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

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https://hg.mozilla.org/integration/gaia-central/rev/30bf8b313e51
Author: PinZhang <zhangpin04@gmail.com>
Desc: Merge pull request #22056 from PinZhang/pzhang/bug1042478-airplanemodehelper

Bug 1042478: AirplaneModeHelper.ready is invoked several times.

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https://hg.mozilla.org/integration/gaia-central/rev/fab343591060
Author: Pin Zhang <pzhang@mozilla.com>
Desc: Bug 1042478: AirplaneModeHelper.ready is invoked several times.
Bumping manifests a=b2g-bump