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

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https://hg.mozilla.org/integration/gaia-central/rev/56c0ac3a55d8
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Merge pull request #23763 from Cwiiis/bug1063487-fix-calendar-oauth

Bug 1063487 - Fix Calendar oauth window. r=mmedeiros

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https://hg.mozilla.org/integration/gaia-central/rev/09b18c337dc6
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Bug 1063487 - Fix Calendar oauth window. r=mmedeiros

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https://hg.mozilla.org/integration/gaia-central/rev/0d6c35ffec2c
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #23755 from crdlc/bug-1063398

Bug 1063398 - lastTouchStart is null after context menu events in collection and search views r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/60e99d211f51
Author: crdlc <crdlc@tid.es>
Desc: Bug 1063398 - lastTouchStart is null after context menu events in collection and search views
Bumping manifests a=b2g-bump