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

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https://hg.mozilla.org/integration/gaia-central/rev/5d371ef610e0
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #15718 from alivedise/bugzilla/949358/callscreen-orientation

Bug 949358 - Orientation management for callscreen + lockscreen + active...,r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/32fea1847c72
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 949358 - Orientation management for callscreen + lockscreen + active app
Bumping manifests a=b2g-bump