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

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https://hg.mozilla.org/integration/gaia-central/rev/e117b6b72606
Author: Carmen Jiménez <cjc@tid.es>
Desc: Merge pull request #16179 from mcjimenez/bug923449

Bug 923449 - SV: Network Display Indicator customization by SIM

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https://hg.mozilla.org/integration/gaia-central/rev/17046a73ca36
Author: Carmen Jimenez Cabezas <cjc@tid.es>
Desc: Bug 923449 - SV: Network Display Indicator customization by SIM

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https://hg.mozilla.org/integration/gaia-central/rev/566c02aade78
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #16168 from zacc/bug_970845

Bug 970845 - test_settings_passcode.py - Wait for passcode to be visible...

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https://hg.mozilla.org/integration/gaia-central/rev/2e87c930f549
Author: Zac Campbell <zcampbell@mozilla.com>
Desc: Bug 970845 - test_settings_passcode.py - Wait for passcode to be visible before attempting to tap it r=viorela
Bumping manifests a=b2g-bump