Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/e9c3b8527d74
Author: Yura Zenevich <yura.zenevich@gmail.com>
Desc: Merge pull request #24449 from yzen/bug-1071159

Bug 1071159 - fixing statusbar visibility in fullscreen app with utility...

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https://hg.mozilla.org/integration/gaia-central/rev/381ffce1808d
Author: Yura Zenevich <yzenevich@mozilla.com>
Desc: Bug 1071159 - fixing statusbar visibility in fullscreen app with utility tray.
Bumping manifests a=b2g-bump