graphics/waffle: track graphics/wayland dependency

> Running Q/A tests (stage-qa)

Error: /usr/local/lib/libwaffle-1.so.0.5.2 is linked to /usr/local/lib/libwayland-client.so.0 from graphics/wayland but it is not declared as a dependency
Warning: you need LIB_DEPENDS+=libwayland-client.so:graphics/wayland
Error: /usr/local/lib/libwaffle-1.so.0.5.2 is linked to /usr/local/lib/libwayland-egl.so.1 from graphics/wayland but it is not declared as a dependency
Warning: you need LIB_DEPENDS+=libwayland-egl.so:graphics/wayland

PR: 227509
Reported by: antoine (via exp-run)