Webcam cover

It's a remix of https://www.thingiverse.com/thing:2595008

Width: 32.0 [mm]
Height: 11.5[mm]
Thickness: 0.8[mm]

The bracket part is asymmetric (top/bottom) that makes it suitable to
most of laptops.
Tested on:
- MacBook Pro 15-inch, 2017
- Lenovo T470s
- Lenovo P51