fullscreen-shell : fullscreen-shell doesn't support the screenshooter

wet_shell_init() of fulscreen-shell has been missing to create a
screenshooter.

 . adding a screenshooter_create() on wel_shell_init() for
 fullscreen-shell.
 . adding a dep_libexe_weston to meson.build to use the screenshooter

Signed-off-by: yj1231.heo <yj1231.heo@samsung.com>

fullscreen-shell/fullscreen-shell.c

@@ -937,5 +937,6 @@ wet_shell_init(struct weston_compositor *compositor,
 			 &zwp_fullscreen_shell_v1_interface, 1, shell,
 			 bind_fullscreen_shell);
 
+	screenshooter_create(compositor);
 	return 0;
 }

fullscreen-shell/meson.build

@@ -4,11 +4,15 @@ if get_option('shell-fullscreen')
 		fullscreen_shell_unstable_v1_server_protocol_h,
 		fullscreen_shell_unstable_v1_protocol_c,
 	]
+	deps_shell_fullscreen=[
+		dep_libweston_public,
+		dep_libexec_weston,
+	]
 	shared_library(
 		'fullscreen-shell',
 		srcs_shell_fullscreen,
 		include_directories: common_inc,
-		dependencies: dep_libweston_public,
+		dependencies: deps_shell_fullscreen,
 		name_prefix: '',
 		install: true,
 		install_dir: dir_module_weston