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

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https://hg.mozilla.org/integration/gaia-1_4/rev/447258d8fb7b
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Merge pull request #18245 from davidflanagan/camera-preview-v1.4

Merge pull request #18059 from davidflanagan/camera-preview

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https://hg.mozilla.org/integration/gaia-1_4/rev/c178459e8d77
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Merge pull request #18059 from davidflanagan/camera-preview

Bug 989361: better swipe handling for switching items in preview r=justindarc(cherry picked from commit fb29a8ea2d79c56cf2dda54ce2056e7e53644243)

Conflicts:

	apps/camera/test/unit/controllers/preview-gallery_test.js

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https://hg.mozilla.org/integration/gaia-1_4/rev/63d28e3028d5
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 994976 - Disable intermittent failing test, alarm > without alarm mocks create two events with simultaneous reminders

Conflicts:
	shared/test/integration/travis-manifest.json

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https://hg.mozilla.org/integration/gaia-1_4/rev/861e6882522b
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 994976 - Disable perma-red TBPL test, alarm > without alarm mocks create two events with simultaneous reminders r=me
Bumping manifests a=b2g-bump