Makefile.am: Include files built for libweston-desktop in BUILT_SOURCES

Without this make distcheck fails would we ever add any other built
sources to libweston-desktop. Also remove the now redundant leftover
nodist sources from desktop-shell source list.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>

Makefile.am

@@ -126,6 +126,8 @@ nodist_libweston_desktop_@LIBWESTON_MAJOR@_la_SOURCES =		\
 	protocol/xdg-shell-unstable-v5-protocol.c		\
 	protocol/xdg-shell-unstable-v5-server-protocol.h
 
+BUILT_SOURCES += $(nodist_libweston_desktop_@LIBWESTON_MAJOR@_la_SOURCES)
+
 libweston-desktop-@LIBWESTON_MAJOR@.la libweston-desktop/libweston_desktop_@LIBWESTON_MAJOR@_la-xdg-shell-v5.lo: protocol/xdg-shell-unstable-v5-server-protocol.h
 
 if SYSTEMD_NOTIFY_SUPPORT
@@ -906,9 +908,7 @@ desktop_shell_la_SOURCES =				\
 	shared/helpers.h
 nodist_desktop_shell_la_SOURCES =			\
 	protocol/weston-desktop-shell-protocol.c	\
-	protocol/weston-desktop-shell-server-protocol.h	\
+	protocol/weston-desktop-shell-server-protocol.h
-	protocol/xdg-shell-unstable-v5-protocol.c	\
-	protocol/xdg-shell-unstable-v5-server-protocol.h
 
 BUILT_SOURCES += $(nodist_desktop_shell_la_SOURCES)
 endif