Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/3fe03e99721d
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #15603 from bebef1987/fix_calendar

Bug 960744 - Intermittent test_calendar_new_event_appears_on_all_calenda...

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https://hg.mozilla.org/integration/gaia-central/rev/e011fe04e4b3
Author: Bebe <bebe@mozilla.ro>
Desc: Bug 960744 - Intermittent test_calendar_new_event_appears_on_all_calendar_views.py
Bumping manifests a=b2g-bump