Bumping gaia.json for 4 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/f161d4a6b878
Author: GaryChen(pychen) <mmm198219@gmail.com>
Desc: Merge pull request #12420 from mpizza/Bug_920394_buidTime_keyboard

Bug 920394 - [Keyboard] Build time default keyboard should use |utils.ga... r=yurenju.

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https://hg.mozilla.org/integration/gaia-central/rev/95426f71e0a1
Author: GaryChen(pychen) <mmm198219@gmail.com>
Desc: Bug 920394 - [Keyboard] Build time default keyboard should use |utils.gaiaOriginURL| to generate app origin

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https://hg.mozilla.org/integration/gaia-central/rev/6cee530c0084
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #12363 from EverythingMe/ccc-sq

Bug 911958 - [e.me][feature] Configurable collections order by operators in build time

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https://hg.mozilla.org/integration/gaia-central/rev/2c4c81ba56fd
Author: Ran Ben Aharon <ran@ranbena.com>
Desc: Bug 911958 - [e.me][feature] Configurable collections order by operators in build time