clients/simple-damage: migrate to wp_viewporter

Use wp_viewporter instead of wl_scaler and rename things as appropriate.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
diff --git a/Makefile.am b/Makefile.am
index 419438e..9c693f7 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -486,8 +486,8 @@
 
 weston_simple_damage_SOURCES = clients/simple-damage.c
 nodist_weston_simple_damage_SOURCES =		\
-	protocol/scaler-protocol.c		\
-	protocol/scaler-client-protocol.h	\
+	protocol/viewporter-protocol.c		\
+	protocol/viewporter-client-protocol.h	\
 	protocol/xdg-shell-unstable-v5-protocol.c		\
 	protocol/xdg-shell-unstable-v5-client-protocol.h	\
 	protocol/fullscreen-shell-unstable-v1-protocol.c	\