Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/e0ca1c37e41e
Author: cctuan <georgeiscoming@gmail.com>
Desc: Revert "Bug 938045 - [Window Management] Implement AppSelection for Copy&Paste on Firefox OS"

This reverts commit 80245c04032ab105ada735e6f206d6fa3e18edc9.
Bumping manifests a=b2g-bump