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

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https://hg.mozilla.org/integration/gaia-central/rev/0bb282d9865e
Author: James Burke <jrburke@gmail.com>
Desc: Merge pull request #20631 from jrburke/bug1022519-calendar-refresh-icon

Bug 1022519 - [B2G][Calendar] wrong refresh button size r=millermedeiros

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https://hg.mozilla.org/integration/gaia-central/rev/85bb5ed7f599
Author: jrburke <jrburke@gmail.com>
Desc: Bug 1022519 - [B2G][Calendar] wrong refresh button size

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https://hg.mozilla.org/integration/gaia-central/rev/5bcdc6206c33
Author: James Burke <jrburke@gmail.com>
Desc: Merge pull request #20635 from jrburke/bug980819-email-text-align

Bug 980819 - [B2G][Email] The text and button has not align center in IMAP disable page r=mcav

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https://hg.mozilla.org/integration/gaia-central/rev/c9f7b163f2c4
Author: jrburke <jrburke@gmail.com>
Desc: Bug 980819 - [B2G][Email] The text and button has not align center in IMAP disable page
Bumping manifests a=b2g-bump