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

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https://hg.mozilla.org/integration/gaia-central/rev/9bd772bfbb19
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Merge pull request #19336 from pivanov/bug-1011687

Bug 1011687 - [Flame][Calendar] - Fuzzy images

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https://hg.mozilla.org/integration/gaia-central/rev/f5864ead5979
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Bug 1011687 - [Flame][Calendar] - Fuzzy images

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https://hg.mozilla.org/integration/gaia-central/rev/fd2304652468
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Merge pull request #19689 from pivanov/bug-1011418

Bug 1011418 - [Dialer][Call Screen] In-app message should follow the visual refresh spec

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https://hg.mozilla.org/integration/gaia-central/rev/fe52de3da54d
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Bug 1011418 - [Dialer][Call Screen] In-app message should follow the visual refresh spec
Bumping manifests a=b2g-bump