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ecore-drm: Fix failure of setting/closing evdev->fd which causes fd leak

Authored by ohduna.

Description

ecore-drm: Fix failure of setting/closing evdev->fd which causes fd leak

Summary:
When a input device is plugged in, _cb_open_restricted() is called before creating evdev.
So setting fd value on evdev was failed in _cb_open_restricted() and also closing evdev->fd was invalid.
Using a eina_hash which has 'path-fd' pairs, we can find fd value after evdev is created.

@fix

Test Plan:
(1) Multiple input devices are connected. Their evdev->fd remains zero or initial value.
(2) When one of those devices are plugged out, fd leak would happen.

Reviewers: raster, zmike, gwanglim, stefan_schmidt, devilhorns, ManMower

Subscribers: cedric, jpeg, Jeon, input.hacker

Differential Revision: https://phab.enlightenment.org/D3428