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

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https://hg.mozilla.org/integration/gaia-central/rev/6b360eb88ae8
Author: Greg Weng <snowmantw@gmail.com>
Desc: Merge pull request #21911 from snowmantw/issue1036236

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

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https://hg.mozilla.org/integration/gaia-central/rev/da5071d1bde8
Author: Greg Weng <snowmantw@gmail.com>
Desc: Bug 1036236 - [LockScreen] Unlock to Camera twice would make it unavailable
Bumping manifests a=b2g-bump