package/gnutls: bump version to 3.6.8

Release notes:
https://lists.gnupg.org/pipermail/gnutls-help/2019-May/004527.html

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
(cherry picked from commit 9e2fcb2e251e0763c00583cc21d3e8cff968976f)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/gnutls/gnutls.hash

@@ -1,6 +1,6 @@
 # Locally calculated after checking pgp signature
-# https://www.gnupg.org/ftp/gcrypt/gnutls/v3.6/gnutls-3.6.7.1.tar.xz.sig
-sha256	881b26409ecd8ea4c514fd3fbdb6fae5fab422ca7b71116260e263940a4bbbad	gnutls-3.6.7.1.tar.xz
+# https://www.gnupg.org/ftp/gcrypt/gnutls/v3.6/gnutls-3.6.8.tar.xz.sig
+sha256	aa81944e5635de981171772857e72be231a7e0f559ae0292d2737de475383e83	gnutls-3.6.8.tar.xz
 # Locally calculated
 sha256	e79e9c8a0c85d735ff98185918ec94ed7d175efc377012787aebcf3b80f0d90b	doc/COPYING
 sha256	6095e9ffa777dd22839f7801aa845b31c9ed07f3d6bf8a26dc5d2dec8ccc0ef3	doc/COPYING.LESSER

package/gnutls/gnutls.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 GNUTLS_VERSION_MAJOR = 3.6
-GNUTLS_VERSION = $(GNUTLS_VERSION_MAJOR).7.1
+GNUTLS_VERSION = $(GNUTLS_VERSION_MAJOR).8
 GNUTLS_SOURCE = gnutls-$(GNUTLS_VERSION).tar.xz
 GNUTLS_SITE = https://www.gnupg.org/ftp/gcrypt/gnutls/v$(GNUTLS_VERSION_MAJOR)
 GNUTLS_LICENSE = LGPL-2.1+ (core library), GPL-3.0+ (gnutls-openssl library)