Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_0/rev/6e1576f4d505
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Merge pull request #24850 from dmarcos/bug1055270v2.0

[Bug 1055270] [KK Only][Flame][Camera] Face detection coordinates are in...

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https://hg.mozilla.org/integration/gaia-2_0/rev/529bee6b8b4d
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: [Bug 1055270] [KK Only][Flame][Camera] Face detection coordinates are inverted

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https://hg.mozilla.org/integration/gaia-2_0/rev/da0ad9b23107
Author: Jocelyn Liu <joliu@mozilla.com>
Desc: Bug 1074152: Handle discoverystatechanged event in bluetooth app.
Bumping manifests a=b2g-bump