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

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https://hg.mozilla.org/integration/gaia-central/rev/ce7bf759bbf4
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #24639 from KevinGrandon/bug_1076454_browser_chrome_failing_test

Bug 1076454 - Intermittent failing test, TEST-UNEXPECTED-FAIL | /builds/slave/test/gaia/apps/system/test/marionette/browser_chrome_share_web_result_test.js | Browser Chrome - Share Web Result share web result via e-mail

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https://hg.mozilla.org/integration/gaia-central/rev/a85c1578bc52
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1076454 - Intermittent failing test, TEST-UNEXPECTED-FAIL | /builds/slave/test/gaia/apps/system/test/marionette/browser_chrome_share_web_result_test.js | Browser Chrome - Share Web Result share web result via e-mail r=daleharvey

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https://hg.mozilla.org/integration/gaia-central/rev/9845c6c67982
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #24970 from KevinGrandon/bug_1080344_keyboard_unit_test_sizing

Bug 1080344 - [Keyboard] Take into account bounding client rect to handle difference in test-runner resolutions

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https://hg.mozilla.org/integration/gaia-central/rev/35c774f095d7
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1080344 - [Keyboard] Take into account bounding client rect to handle difference in test-runner resolutions r=rudyl
Bumping manifests a=b2g-bump