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

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https://hg.mozilla.org/integration/gaia-central/rev/4e76ef50441e
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #26804 from cctuan/1049367

Bug 1049367 - [Text Selection] We should remove fake pressing function from js marionette

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https://hg.mozilla.org/integration/gaia-central/rev/c21ed60fa79e
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 1049367 - [Text Selection] We should remove fake pressing function from js marionette

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https://hg.mozilla.org/integration/gaia-central/rev/156a591ca28a
Author: Florin Strugariu <florin.strugariu@softvision.ro>
Desc: Merge pull request #26796 from npark-mozilla/1111637

Bug 1111637 - Create a new test case for the switching to camera from gallery and back

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https://hg.mozilla.org/integration/gaia-central/rev/c08ede3e2bc8
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 1111637: Create a new test case for the switching to camera from gallery and back
Bumping manifests a=b2g-bump