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

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

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https://hg.mozilla.org/integration/gaia-central/rev/099c0f14df1d
Author: gitmai <mri@tid.es>
Desc: Merge pull request #21812 from empoalp/bug_1039199

Bug 1039199 - [Dialer] When you put the phone on your ear, tones are not...
r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/a4baf0fd2181
Author: David Garcia <davidg@tid.es>
Desc: Bug 1039199 - [Dialer] When you put the phone on your ear, tones are not played using telephony channel

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https://hg.mozilla.org/integration/gaia-central/rev/0e90b1543a83
Author: Ben Francis <ben@tola.me.uk>
Desc: Merge pull request #21632 from benfrancis/1035877

Bug 1035877 - Fix CSS for statusbar icon overflow r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/6a04788a654c
Author: Ben Francis <ben@tola.me.uk>
Desc: Bug 1035877 - Fix CSS for statusbar icon overflow