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

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https://hg.mozilla.org/integration/gaia-central/rev/f87f35a9938f
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #16102 from Darep/969768-fix-reload-application

Bug 969768: Fix "Reload application" button on the Gaia browser-helper extension

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https://hg.mozilla.org/integration/gaia-central/rev/29e59e74e9e7
Author: Antti-Jussi Kovalainen <ajk@ajk.fi>
Desc: Bug 969768: Fix "Reload application" button on the Gaia browser-helper
Bumping manifests a=b2g-bump
Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/5db3ae28ac3a
Author: Eitan Isaacson <eitan@monotonous.org>
Desc: Merge pull request #16006 from eeejay/bug-968465

Bug 968465 - Auto show/hide developer settings with pref.

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https://hg.mozilla.org/integration/gaia-central/rev/6a727f57ff2e
Author: Eitan Isaacson <eitan@monotonous.org>
Desc: Bug 968465 - [Settings] Auto show/hide developer settings with pref.
Bumping manifests a=b2g-bump