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

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https://hg.mozilla.org/integration/gaia-central/rev/65d4ea2f27ee
Author: Arnau <arnau@arnaumarch.com>
Desc: Merge pull request #19875 from pacorampas/tuning-object-menu-1018915

Bug 1018915 - [Building blocks] Update object menu to give more flexibil... r=me

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https://hg.mozilla.org/integration/gaia-central/rev/431216cb21b4
Author: Paco Rampas <pacorampas@gmail.com>
Desc: Bug 1018915 - [Building blocks] Update object menu to give more flexibility to lists

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https://hg.mozilla.org/integration/gaia-central/rev/f16d660c67a8
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #19893 from KevinGrandon/bug_1018942_collection_testing

Bug 1018942 - Collection App Testing

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https://hg.mozilla.org/integration/gaia-central/rev/f0e76d6ee1ec
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1018942 - Collection App Testing r=armirn
Bumping manifests a=b2g-bump