package/sslh: fixup the 'v' prefix in the version

In order for the sslh version to match what is given by
release-monitoring.org, the 'v' prefix should be encoded in
SSLH_SOURCE and not SSLH_VERSION.

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

package/sslh/sslh.mk

@@ -4,7 +4,8 @@
 #
 ################################################################################
 
-SSLH_VERSION = v1.20
+SSLH_VERSION = 1.20
+SSLH_SOURCE = sslh-v$(SSLH_VERSION).tar.gz
 SSLH_SITE = http://www.rutschle.net/tech/sslh
 SSLH_LICENSE = GPL-2.0+
 SSLH_LICENSE_FILES = COPYING