Bumping gaia.json for 5 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/baeb7ca3935d
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #15021 from KevinGrandon/mega_unit_test_run

Fix intermittent unit tests. Increase test timeout.

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https://hg.mozilla.org/integration/gaia-central/rev/a31a6168edc6
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 956590 - Increase test timeouts

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https://hg.mozilla.org/integration/gaia-central/rev/17476544aadb
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 956590 - Disable intermittent tests

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https://hg.mozilla.org/integration/gaia-central/rev/133d3c32a4c0
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #15030 from kumarrishav/issue-949327

Bug 949327 - [Settings] Update the NFC icon - bug fixed r=crh0716

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https://hg.mozilla.org/integration/gaia-central/rev/64be60c759e3
Author: kumarrishav <reactiverishav007@gmail.com>
Desc: Bug 949327 - [Settings] Update the NFC icon - bug fixed