Bumping gaia.json for 6 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/68844e5e97fe
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Merge pull request #24242 from sv99/1070495

Bug 1070495 - [ringtones] unit test refactoring for new version chai.assert api

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https://hg.mozilla.org/integration/gaia-central/rev/b4954a35b0cc
Author: sv99 <sv99@inbox.ru>
Desc: Bug 1070495 - [ringtones] unit test refactoring for new version chai.assert api

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https://hg.mozilla.org/integration/gaia-central/rev/d1493f1ff75e
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Merge pull request #24211 from tauzen/Bug1069188_sesssion_token_removal

Bug 1069188 - [NFC] NfcManager not passing sessionToken to activities, r=gweng

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https://hg.mozilla.org/integration/gaia-central/rev/f0a4de8ad544
Author: Krzysztof Mioduszewski <kmioduszewski@gmail.com>
Desc: Bug 1069188 - [NFC] NfcManager not passing sessionToken to activities, r=gweng

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https://hg.mozilla.org/integration/gaia-central/rev/458e9fed1044
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Merge pull request #24150 from ddrmanxbxfr/bug_1062806

Bug 1062806 - Use the new shared helper for loading JSON files in the co..

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https://hg.mozilla.org/integration/gaia-central/rev/d511ac0ae852
Author: Mathieu Rhéaume <mathieu@codingrhemes.com>
Desc: Bug 1062806 - Use the new shared helper for loading JSON files in the cost control app
Bumping manifests a=b2g-bump