Fix partial dependency in protocol/meson.build

External dependencies in Meson do not have include_directories,
therefore "includes: true" means nothing for the wayland-client partial
dependency. Because of this, the -I CFLAGs for wayland-client are not
used by the build command. This commit fixes this by using compile_args.

protocol/meson.build

@@ -77,7 +77,7 @@ endforeach
 lib_wl_protos = static_library(
 	'wl_protos',
 	wl_protos_src + wl_protos_headers,
-	dependencies: wayland_client.partial_dependency(includes: true),
+	dependencies: wayland_client.partial_dependency(compile_args: true),
 )
 
 wlr_protos = declare_dependency(