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

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https://hg.mozilla.org/integration/gaia-central/rev/4009d372875a
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #17714 from Archaeopteryx/ftu-fiReloaded

Bug 988900 - [first run] tutorial: 'ﬁ' in 'notiﬁcations' is one character, should be two (= 'notifications'). r=fcampo

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https://hg.mozilla.org/integration/gaia-central/rev/feaef7c77ecc
Author: Sebastian Hengst <archaeopteryx@coole-files.de>
Desc: Bug 988900 - [first run] tutorial: 'ﬁ' in 'notiﬁcations' is one character, should be two (= 'notifications'). r=fcampo

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https://hg.mozilla.org/integration/gaia-central/rev/5c7306e8ff6f
Author: vingtetun <21@vingtetun.org>
Desc: Merge pull request #17716 from vingtetun/bug984151-landing

Bug 984151 - Make the contacts image pull up effect smoother. r=arcturus

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https://hg.mozilla.org/integration/gaia-central/rev/c85f1d1d3752
Author: Vivien Nicolas <21@vingtetun.org>
Desc: Bug 984151 - Make the contacts image pull up effect smoother. r=arcturus
Bumping manifests a=b2g-bump