Bumping gaia.json for 6 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/0fef5c40f8fe
Author: Ben Kelly <bkelly@mozilla.com>
Desc: Merge pull request #16919 from gittup/bug-917630

Bug 917630 - Allow unlimited keypresses when on a call r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/86f19ea1a3d2
Author: Mike Shal <marfey@gmail.com>
Desc: Bug 917630 - Allow unlimited keypresses when on a call

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https://hg.mozilla.org/integration/gaia-central/rev/09fbc5277ccb
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Merge pull request #20630 from mcav/button-css

Bug 1017410 - [B2G][Clock] The stop button does not use new design butto... r=millermedieros

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https://hg.mozilla.org/integration/gaia-central/rev/8675288807b1
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Bug 1017410 - [B2G][Clock] The stop button does not use new design button.

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https://hg.mozilla.org/integration/gaia-central/rev/0f7ca2fde74c
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Merge pull request #20629 from mcav/center-delete

Bug 1022512 - [B2G][Clock] Tap an existing alarm, the text on delete but... r=millermedeiros

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https://hg.mozilla.org/integration/gaia-central/rev/e275a92fdba8
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Bug 1022512 - [B2G][Clock] Tap an existing alarm, the text on delete button does not horizontally center aligned.
Bumping manifests a=b2g-bump