package/vpnc: use github release

Use github release instead of commit hash so the package will be set as
"up-to-date" in http://autobuild.buildroot.org/stats

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/vpnc/vpnc.hash

@@ -1,3 +1,3 @@
 # locally computed hash
-sha256  c10a5c2c0813198ca2404dd36db380cdb6395b46338123b341775095cf61521d  vpnc-b1243d29e0c00312ead038b04a2cf5e2fa31d740.tar.gz
+sha256  5929d3b7f72970c8f7850e0daba0d9d05aaaa1281c69f58ac8647be11385ede5  vpnc-0.5.3r550-2jnpr1.tar.gz
 sha256  bf3ec1bd1dec31a6ab8980bfd04569f506432f35ee01e88a3910847784bc2de1  COPYING

package/vpnc/vpnc.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-VPNC_VERSION = b1243d29e0c00312ead038b04a2cf5e2fa31d740
+VPNC_VERSION = 0.5.3r550-2jnpr1
 VPNC_SITE = $(call github,ndpgroup,vpnc,$(VPNC_VERSION))
 VPNC_LICENSE = GPL-2.0+
 VPNC_LICENSE_FILES = COPYING