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

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https://hg.mozilla.org/integration/gaia-central/rev/30948612490a
Author: Miller Medeiros <miller@millermedeiros.com>
Desc: Merge pull request #17074 from millermedeiros/981441-dst-day-view

Bug 981441 - DST bug in day_view_test.js results in "TEST-UNEXPECTED-FAIL | day view events longer than 2h click after event end" during the day daylight time begins r=gaye

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https://hg.mozilla.org/integration/gaia-central/rev/a57be6acbe8e
Author: Miller Medeiros <miller@millermedeiros.com>
Desc: Bug 981441 - DST bug in day_view_test.js results in "TEST-UNEXPECTED-FAIL | day view events longer than 2h click after event end" during the day daylight time begins

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https://hg.mozilla.org/integration/gaia-central/rev/ae68e52eec42
Author: Douglas Sherk <github@sherk.me>
Desc: Merge pull request #16685 from DouglasSherk/dsds

Bug 946866 - [DSDS][Dialer][SMS] On-the-fly SIM change when calling, supporting refactors. r=Rik

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https://hg.mozilla.org/integration/gaia-central/rev/68a2f4f1d760
Author: DouglasSherk <github@sherk.me>
Desc: Bug 946866 - [DSDS][Dialer][SMS] On-the-fly SIM change when calling, supporting refactors. r=Rik
Bumping manifests a=b2g-bump