package/swupdate: default website have a new API

2018.03 introduce a new website with Websocket asynchronous
communication[1]

[1] https://github.com/sbabic/swupdate/blob/master/doc/source/mongoose.rst

Signed-off-by: Julien Corjon <corjon.j@ecagroup.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 2d9e9d04d7e810e4c97f14dd84acfbdb43b9b3ea)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/swupdate/swupdate.mk

@@ -125,7 +125,7 @@ define SWUPDATE_INSTALL_TARGET_CMDS
 	$(INSTALL) -D -m 0755 $(@D)/swupdate $(TARGET_DIR)/usr/bin/swupdate
 	$(if $(BR2_PACKAGE_SWUPDATE_INSTALL_WEBSITE), \
 		mkdir -p $(TARGET_DIR)/var/www/swupdate; \
-		cp -dpf $(@D)/www/* $(TARGET_DIR)/var/www/swupdate)
+		cp -dpfr $(@D)/examples/www/v2/* $(TARGET_DIR)/var/www/swupdate)
 endef
 
 # Checks to give errors that the user can understand