package/memcached: security bump to version 1.6.8

Small security related release. A remote crash is possible if UDP is
enabled. The remediation is to upgrade or disable UDP. The crash was
introduced in the 1.6 series.

https://github.com/memcached/memcached/wiki/ReleaseNotes168

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

package/memcached/memcached.hash

@@ -1,6 +1,6 @@
-# From http://www.memcached.org/files/memcached-1.6.7.tar.gz.sha1
-sha1  49336bb0a4b7ad296422b08148581ed54edf32d0  memcached-1.6.7.tar.gz
+# From http://www.memcached.org/files/memcached-1.6.8.tar.gz.sha1
+sha1  8f3efd851efc5b822bd991b93d06a271b2fac052  memcached-1.6.8.tar.gz
 
 # Locally computed
-sha256  7bbdac9b031d8cfca4a1207f28df598b90ee2e9b44667f7eabd0fe1a59ca5173  memcached-1.6.7.tar.gz
+sha256  e23b3a11f6ff52ac04ae5ea2e287052ce58fd1eadd394622eb65c3598fcd7939  memcached-1.6.8.tar.gz
 sha256  bc887c4ad8051fe690ace9528fe37a2e0bb362e6d963331d82e845ca9b585a0c  COPYING

package/memcached/memcached.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-MEMCACHED_VERSION = 1.6.7
+MEMCACHED_VERSION = 1.6.8
 MEMCACHED_SITE = http://www.memcached.org/files
 MEMCACHED_DEPENDENCIES = libevent
 MEMCACHED_CONF_ENV = ac_cv_prog_cc_c99='-std=gnu99'