package/asterisk: security bump to version 16.2.1

Fixes the following security issue:

AST-2019-001: Remote crash vulnerability with SDP protocol violation
When Asterisk makes an outgoing call, a very specific SDP protocol violation
by the remote party can cause Asterisk to crash (CVE-2019-7251)

https://downloads.asterisk.org/pub/security/AST-2019-001.html

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/asterisk/asterisk.hash

@@ -1,5 +1,5 @@
 # Locally computed
-sha256  d74ba84ad92cd710eb071940e6057ef644d71864431d91aaafe0717a8939afc3  asterisk-16.1.1.tar.gz
+sha256  c022e9d5410ed94ab1aa51ba1e2a8b196f0dfa15bcd0bd545d06efee4c786578  asterisk-16.2.1.tar.gz
 
 # sha1 from: http://downloads.asterisk.org/pub/telephony/sounds/releases
 # sha256 locally computed

package/asterisk/asterisk.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-ASTERISK_VERSION = 16.1.1
+ASTERISK_VERSION = 16.2.1
 # Use the github mirror: it's an official mirror maintained by Digium, and
 # provides tarballs, which the main Asterisk git tree (behind Gerrit) does not.
 ASTERISK_SITE = $(call github,asterisk,asterisk,$(ASTERISK_VERSION))