package/connman: security bump to 1.40

Fix CVE-2021-33833 which is a stack buffer overflow in dnsproxy.

Release notes:
https://lore.kernel.org/connman/20210610113503.ob45lhssqy5hk4ki@beryllium.lan/

Signed-off-by: John Keeping <john@metanate.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit e5d9af8de0d84ef9d9a0bb9c4a85e7802da4baed)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/connman/connman.hash

@@ -1,4 +1,4 @@
 # From https://www.kernel.org/pub/linux/network/connman/sha256sums.asc
-sha256  9f62a7169b7491c670a1ff2e335b0d966308fb2f62e285c781105eb90f181af3  connman-1.39.tar.xz
+sha256  1a57ae7ce234aa3a1744aac3be5c2121d98dce999440ef8ab9cc4edfd5edcb12  connman-1.40.tar.xz
 # Locally computed
 sha256  b499eddebda05a8859e32b820a64577d91f1de2b52efa2a1575a2cb4000bc259  COPYING

package/connman/connman.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-CONNMAN_VERSION = 1.39
+CONNMAN_VERSION = 1.40
 CONNMAN_SOURCE = connman-$(CONNMAN_VERSION).tar.xz
 CONNMAN_SITE = $(BR2_KERNEL_MIRROR)/linux/network/connman
 CONNMAN_DEPENDENCIES = libglib2 dbus iptables