snmp++: security bump to v3.3.10

>From the changelong:
Set the FD_CLOEXEC flag on sockets, so they are not "leaked" to
spawned processes

Signed-off-by: Adam Duskett <aduskett@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/snmppp/snmppp.hash

@@ -1,2 +1,3 @@
 # Locally computed:
-sha256 2ef0cb20658c1eb9e053f8a7a9d5c8f5ebf2f734d37b692fdbf7163ea17dde6f  snmp++-3.3.9.tar.gz
+sha256 6827adb6a6a68a7f32c41fa12bdfd0aa48f4825b8773f63fc4d5c8482d4ed481	snmp++-3.3.10.tar.gz
+sha256 d00d5deb9ce44fa01ddf6f882de3ea8b9e8402f776b546dd982d55367ebbd392	src/v3.cpp

package/snmppp/snmppp.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-SNMPPP_VERSION = 3.3.9
+SNMPPP_VERSION = 3.3.10
 SNMPPP_SOURCE = snmp++-$(SNMPPP_VERSION).tar.gz
 SNMPPP_SITE = http://www.agentpp.com/download
 SNMPPP_DEPENDENCIES = host-pkgconf