Bumping gaia.json for 5 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/92078a873c0d
Author: bmac <bmac325@GMail.com>
Desc: Bug 917339 - [Clock] Timer Sound should use same input type as Alarm Sound

r=jugglinmike

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https://hg.mozilla.org/integration/gaia-central/rev/45f6ae2e7503
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Merge pull request #12546 from EverythingMe/910354-add-collections

Bug 910354 - [e.me][feature] Add Collections

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https://hg.mozilla.org/integration/gaia-central/rev/6d67875c6185
Author: Amir Nissim <amirn@everything.me>
Desc: Bug 910354 - [e.me][feature] Add Collections [r=crdlc]

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https://hg.mozilla.org/integration/gaia-central/rev/58bc6ee1b213
Author: Evyatar Amitay <evyatron@gmail.com>
Desc: Merge pull request #12619 from EverythingMe/923097-save-to-homescreen

[Bug 923097] Fix add to homescreen [r=crdlc]

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https://hg.mozilla.org/integration/gaia-central/rev/52acdbd09e59
Author: Evyatar Amitay <evyatron@gmail.com>
Desc: [Bug 923097] Fix add to homescreen [r=crdlc]