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

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https://hg.mozilla.org/integration/gaia-2_0/rev/93dc3f9dba7b
Author: Greg Weng <snowmantw@gmail.com>
Desc: Merge pull request #21662 from snowmantw/issue1036236-2.0

 Bug 1036236 - [LockScreen] Unlock to Camera twice would make it unavail...

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https://hg.mozilla.org/integration/gaia-2_0/rev/ffe955698269
Author: Greg Weng <snowmantw@gmail.com>
Desc: Bug 1036236 - [LockScreen] Unlock to Camera twice would make it unavailable
Bumping manifests a=b2g-bump