Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/e2efbf278a0b
Author: Carsten Book -Tomcat- <cbook@mozilla.com>
Desc: Revert "bug 948826, add prompt testing" for suspicion of causing Windows Build Bustages

This reverts commit 24d9c772fe6eb62e9ad8ae63e6d4b2ed569f6299.

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https://hg.mozilla.org/integration/gaia-central/rev/57f12fa4c55f
Author: Jan Jongboom <janjongboom@gmail.com>
Desc: Merge pull request #15424 from DouglasSherk/keyboard-reflow

Bug 927319 - Fix key presses causing reflows of the entire keyboard. r=janjongboom

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https://hg.mozilla.org/integration/gaia-central/rev/eda46fe5ede8
Author: DouglasSherk <github@sherk.me>
Desc: Bug 927319 - Fix key presses causing reflows of the entire keyboard.
Bumping manifests a=b2g-bump