Log Message:
wayland-protocols: update to 1.37.

wayland-protocols 1.37 is now available.

This release contains three new protocols:

 * xdg-toplevel-icon

Associate an icon with a toplevel window.

 * ext-image-capture-source
 * ext-image-copy-capture

A set of protocols that together allow capturing the pixel content of
outputs and toplevels.

Apart from this, it includes the usual protocol documentation
improvements and fixes, as well as clarification of existing protocol
review practices.