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

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https://hg.mozilla.org/integration/gaia-central/rev/a24d67d3941a
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Merge pull request #21939 from Rik/incoming-screen-961154

Bug 961154 - When a second incoming call occurs, it does not turn the sc... r=drs

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https://hg.mozilla.org/integration/gaia-central/rev/c5aca7a532f9
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Bug 961154 - When a second incoming call occurs, it does not turn the screen on

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https://hg.mozilla.org/integration/gaia-central/rev/21f2f7f960d9
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Merge pull request #21964 from EverythingMe/1040618-migrate

Bug 1040618 - [B2G][OTA] Several issues opening smart collections migrat...

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https://hg.mozilla.org/integration/gaia-central/rev/f7011df19e68
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Bug 1040618 - [B2G][OTA] Several issues opening smart collections migrated from 1.x
Bumping manifests a=b2g-bump