WPEFrameworkPlugin:AVS: pass PLUGIN_AVS_PERSISTENT_ROOT_PATH from buildsystem (#507)

Author: HaseenaSainul

package/wpe/wpeframework-plugins/wpeframework-plugins.mk

@@ -35,6 +35,7 @@ else
 WPEFRAMEWORK_PLUGINS_CONF_OPTS += -DPLUGIN_AVS_AUTOSTART=false
 endif
 
+WPEFRAMEWORK_PLUGINS_CONF_OPTS += -DPLUGIN_AVS_PERSISTENT_ROOT_PATH=$(BR2_PACKAGE_WPEFRAMEWORK_PERSISTENT_PATH)
 ifeq ($(BR2_PACKAGE_WPEFRAMEWORK_AVS_PLATFORM_RPI3),y)
 WPEFRAMEWORK_PLUGINS_CONF_OPTS += -DPLUGIN_AVS_PLATFORM="rpi3"
 else ifeq ($(BR2_PACKAGE_WPEFRAMEWORK_AVS_PLATFORM_CUSTOM),y)