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

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https://hg.mozilla.org/integration/gaia-2_0/rev/40639a59e9fa
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #22235 from cctuan/1041467-M

Bug 1041467 - [MTBF] App only covers top half of the screen

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https://hg.mozilla.org/integration/gaia-2_0/rev/de7329ab2edc
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Merge pull request #22221 from dmarcos/bug1044317

Bug 1044317 - Can't record video - JavaScript Error: "TypeError: t is un...

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https://hg.mozilla.org/integration/gaia-2_0/rev/e4f1719489e7
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Merge pull request #22090 from dmarcos/bug1041811

[Bug 1041811] [B2G][Camera] The "Select" button is unresponsive when tak...
Conflicts:
	apps/camera/js/lib/storage.js

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https://hg.mozilla.org/integration/gaia-2_0/rev/4d16da599b88
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Revert "Merge pull request #22184 from dmarcos/bug1036259master"

This reverts commit 2764488eb92e120b42a55a81d482c4f44bc3597a.
Bumping manifests a=b2g-bump