package/rpi-userland: fix hello_ applications

The HELLO_ examples fail to run because the librevision.so
library build by the userland package is not included
in the image.

Include this library if BR2_PACKAGE_RPI_USERLAND_HELLO
is selected.

Signed-off-by: Tim Gover <tim.gover@raspberrypi.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 5044928baeaed86cee6f8452dc3850d5d0cb80a5)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/rpi-userland/rpi-userland.mk

@@ -25,6 +25,9 @@ define RPI_USERLAND_EXTRA_LIBS_TARGET
 	$(INSTALL) -m 0644 -D \
 		$(@D)/build/lib/libilclient.so \
 		$(TARGET_DIR)/usr/lib/libilclient.so
+	$(INSTALL) -m 0644 -D \
+		$(@D)/build/lib/librevision.so \
+		$(TARGET_DIR)/usr/lib/librevision.so
 endef
 RPI_USERLAND_POST_INSTALL_TARGET_HOOKS += RPI_USERLAND_EXTRA_LIBS_TARGET
 
@@ -32,6 +35,9 @@ define RPI_USERLAND_EXTRA_LIBS_STAGING
 	$(INSTALL) -m 0644 -D \
 		$(@D)/build/lib/libilclient.so \
 		$(STAGING_DIR)/usr/lib/libilclient.so
+	$(INSTALL) -m 0644 -D \
+		$(@D)/build/lib/librevision.so \
+		$(STAGING_DIR)/usr/lib/librevision.so
 endef
 RPI_USERLAND_POST_INSTALL_STAGING_HOOKS += RPI_USERLAND_EXTRA_LIBS_STAGING