graphics/wayland-protocols: Update to 1.17

Changes: https://cgit.freedesktop.org/wayland/wayland-protocols/log/?h=1.17
PR: 235178
Submitted by: contact@emersion.fr (for builds.sr.ht), jbeich
MFH: 2019Q1 (no changes to existing protocols, facilitates automation elsewhere)
Sponsored by: B3 Init (zeising)