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

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https://hg.mozilla.org/integration/gaia-central/rev/5c950d582dbd
Author: Ian Liu <iliu@mozilla.com>
Desc: Merge pull request #24603 from yrliou/bug1074152

Bug 1074152: "Searching for devices" never ends when trying to performing various sharing activities, r=ianliu

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https://hg.mozilla.org/integration/gaia-central/rev/d408d77bba89
Author: Jocelyn Liu <joliu@mozilla.com>
Desc: Bug 1074152: Handle discoverystatechanged event in bluetooth app.
Bumping manifests a=b2g-bump