package/snmppp: bump to version 3.4.9

Update hash of src/v3.cpp, update in year and "Frank Fock" added:

 -  _##  SNMP++ v3.3
 +  _##  SNMP++ v3.4
 -  _##  Copyright (c) 2001-2013 Jochen Katz, Frank Fock
 +  _##  Copyright (c) 2001-2021 Jochen Katz, Frank Fock
 -  _##  Hewlett-Packard and Jochen Katz make no representations about the
 -  _##  suitability of this software for any purpose. It is provided
 +  _##  Hewlett-Packard, Frank Fock, and Jochen Katz make no representations
 +  _##  about the suitability of this software for any purpose. It is provided

https://www.agentpp.com/download/changes_snmp++v3.txt

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

package/snmppp/snmppp.hash

@@ -1,3 +1,3 @@
 # Locally computed:
-sha256  a3eb75e2310c315d9b2c2094154c7cd9b46684adb80a4b36b8957dcc09af4041  snmp++-3.4.2.tar.gz
-sha256  f6fd4321c7eb6e51a272f91f964aea7f53039bb2b55f690d5a9d042f3a5d79b9  src/v3.cpp
+sha256  7c0aaf4ea21db082453f880cc2062a86dcbbf0ee6c8d47c72beb8e0c77c26b6c  snmp++-3.4.9.tar.gz
+sha256  61337e799c8274e596e5783b22607beea8073ee296c6b27fc5c7487296e56851  src/v3.cpp

package/snmppp/snmppp.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-SNMPPP_VERSION = 3.4.2
+SNMPPP_VERSION = 3.4.9
 SNMPPP_SOURCE = snmp++-$(SNMPPP_VERSION).tar.gz
 SNMPPP_SITE = http://www.agentpp.com/download
 SNMPPP_DEPENDENCIES = host-pkgconf