wpa-supplicant: add wpa_supplicant.conf to CONFFILES and don't install it twice
* first we install ${WORKDIR}/wpa_supplicant.conf-sane
install -m 600 ${WORKDIR}/wpa_supplicant.conf-sane ${D}${sysconfdir}/wpa_supplicant.conf
and a bit later in do_install we were overwritting it with ${WORKDIR}/wpa_supplicant.conf
install -m 644 ${WORKDIR}/wpa_supplicant.conf ${D}${sysconfdir}
* notice that this patch also changes .conf permissions from 644 back to 600
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
