package/libnftnl: bump to version 1.2.6

For change log, see:
https://www.netfilter.org/projects/libnftnl/files/changes-libnftnl-1.2.6.txt

This commit also adds comments in hash file:
- that pgp signature was verified with links
- that the license file hash was locally computed

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/libnftnl/libnftnl.hash

@@ -1,3 +1,8 @@
 # From http://www.netfilter.org/projects/libnftnl/downloads.html
-sha256  966de0a8120c8a53db859889749368bfb2cba0c4f0b4c1a30d264eccc45f1226  libnftnl-1.2.5.tar.xz
+# Checked pgp signature:
+# https://www.netfilter.org/projects/libnftnl/files/libnftnl-1.2.6.tar.xz.sig
+# with key:
+# https://www.netfilter.org/files/coreteam-gpg-key-0xD55D978A8A1420E4.txt
+sha256  ceeaea2cd92147da19f13a35a7f1a4bc2767ff897e838e4b479cf54b59c777f4  libnftnl-1.2.6.tar.xz
+# Locally computed:
 sha256  98193898c663001eff2fdcfb676e210c13042bc1a05e8d570c363efa396f8e24  COPYING

package/libnftnl/libnftnl.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LIBNFTNL_VERSION = 1.2.5
+LIBNFTNL_VERSION = 1.2.6
 LIBNFTNL_SITE = https://netfilter.org/projects/libnftnl/files
 LIBNFTNL_SOURCE = libnftnl-$(LIBNFTNL_VERSION).tar.xz
 LIBNFTNL_LICENSE = GPL-2.0+