build/configs/artik053/tc: Fix number of socket descriptors
The network testcase will open more than eight sockets. Therefore, the number of socket descriptors is increased to 16.
@@ -606,7 +606,7 @@ CONFIG_NET_IPv6_DUP_DETECT_ATTEMPTS=1
# Socket support
#
CONFIG_NET_SOCKET=y
-CONFIG_NSOCKET_DESCRIPTORS=8
+CONFIG_NSOCKET_DESCRIPTORS=16
CONFIG_NET_TCP_KEEPALIVE=y
CONFIG_NET_RAW=y
# CONFIG_NET_SOCKET_OPTION_BROADCAST is not set
