build: move wayland-client dep to backend/wayland/

wayland-client isn't really used by wlroots core, so let's move the
dep to where it's needed in the Wayland backend.

backend/wayland/meson.build

@@ -1,3 +1,9 @@
+wayland_client = dependency('wayland-client',
+	fallback: ['wayland', 'wayland_client_dep'],
+	default_options: wayland_project_options,
+)
+wlr_deps += wayland_client
+
 wlr_files += files(
 	'backend.c',
 	'output.c',

examples/meson.build

@@ -1,6 +1,7 @@
 threads = dependency('threads')
 wayland_egl = dependency('wayland-egl')
 wayland_cursor = dependency('wayland-cursor')
+wayland_client = dependency('wayland-client')
 libpng = dependency('libpng', required: false, disabler: true)
 egl = dependency('egl', required: false, disabler: true)
 glesv2 = dependency('glesv2', required: false, disabler: true)

meson.build

@@ -103,10 +103,6 @@ wayland_server = dependency('wayland-server',
 	fallback: ['wayland', 'wayland_server_dep'],
 	default_options: wayland_project_options,
 )
-wayland_client = dependency('wayland-client',
-	fallback: ['wayland', 'wayland_client_dep'],
-	default_options: wayland_project_options,
-)
 
 drm = dependency('libdrm', version: '>=2.4.105')
 gbm = dependency('gbm', version: '>=17.1.0')
@@ -119,7 +115,6 @@ rt = cc.find_library('rt')
 wlr_files = []
 wlr_deps = [
 	wayland_server,
-	wayland_client,
 	drm,
 	gbm,
 	xkbcommon,