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

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https://hg.mozilla.org/integration/gaia-central/rev/5b3c57323fdc
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #19494 from KevinGrandon/bug_1013842_reland

Bug 1013842 - Create gaia-menu Web Component

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https://hg.mozilla.org/integration/gaia-central/rev/f930309c194b
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1013842 - Create gaia-menu Web Component [r=kgrandon]

This reverts commit 9fac6e9c3acff17ef21ba144733ccae6e0e905d2.

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https://hg.mozilla.org/integration/gaia-central/rev/a9d387f8ed1e
Author: James Burke <jrburke@gmail.com>
Desc: Merge pull request #19517 from jrburke/bug1014278-email-nomail-overlap

Bug 1014278 - [B2G][E-mail]'No mail in this Folder' text overlaps email in Local Drafts folder r=asuth

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https://hg.mozilla.org/integration/gaia-central/rev/b8ad6aae3faa
Author: jrburke <jrburke@gmail.com>
Desc: Bug 1014278 - [B2G][E-mail]'No mail in this Folder' text overlaps email in Local Drafts folder
Bumping manifests a=b2g-bump