iwinfo: fix WPA cipher reporting

Within the Lua binding, use the same logic as the command line interface for
reporting the used WPA ciphers. Instead of printing the intersection of
pairwise and group ciphers, report both group and pairwise ciphers.

This fixes a case where a connection which uses CCMP for pairwise and TKIP
as groupwise cipher is getting reported as using the NONE cipher.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

package/network/utils/iwinfo/Makefile

@@ -7,13 +7,13 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libiwinfo
-PKG_VERSION:=2016-07-29
+PKG_VERSION:=2016-09-21
 PKG_RELEASE=$(PKG_SOURCE_VERSION)
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(LEDE_GIT)/project/iwinfo.git
 PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
-PKG_SOURCE_VERSION:=717ff717509e53ace280c4216d1150af5f1d1b82
+PKG_SOURCE_VERSION:=fd9e17be0c43bd6b8df5371f0b353747bc563874
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)-$(PKG_SOURCE_VERSION).tar.gz
 PKG_MAINTAINER:=Jo-Philipp Wich <jo@mein.io>
 PKG_LICENSE:=GPL-2.0