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

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https://hg.mozilla.org/integration/gaia-central/rev/94fa8cdef287
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #24916 from alivedise/bugzilla/1069500/permission-dialog-under-attention-window

Bug 1069500 - Promote permission dialog to on top of attention window, r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/179ae9af32e4
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 1069500 - Promote permission dialog to on top of attention window
Bumping manifests a=b2g-bump