verysync: add auto select latest version support (#4790)

package/lean/verysync/Makefile

@@ -28,8 +28,16 @@ ifeq ($(ARCH),powerpc64)
 	PKG_ARCH_VERYSYNC:=ppc64
 endif
 
+LATEST_VERSION:=$(shell curl http://www.verysync.com/shell/latest)
+
 PKG_NAME:=verysync
-PKG_VERSION:=v1.4.3
+
+ifneq ($(LATEST_VERSION),)
+	PKG_VERSION:=$(LATEST_VERSION)
+else
+	PKG_VERSION:=v1.4.3
+endif
+
 PKG_RELEASE:=1
 PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(PKG_VERSION)
 PKG_SOURCE:=$(PKG_NAME)-linux-$(PKG_ARCH_VERYSYNC)-$(PKG_VERSION).tar.gz