tests: Make wpa_supplicant and hostapd executable through valgrind

It looks like valgrind could not under buildbot with the default file
mode. Fix this by making wpa_supplicant and hostapd binaries readable
and executable by everyone.

Signed-hostap: Jouni Malinen <j@w1.fi>

tests/hwsim/start.sh

@@ -20,8 +20,10 @@ sudo $WLANTEST -i hwsim0 -c -d > $DIR/logs/$DATE-hwsim0 &
 sudo tcpdump -ni hwsim0 -s 2500 -w $DIR/logs/$DATE-hwsim0.dump &
 if [ "x$VALGRIND" = "xy" ]; then
     for i in 0 1 2; do
+	chmod a+rx $WPAS
 	sudo valgrind --log-file=$DIR/logs/$DATE-valgrind-wlan$i $WPAS -g /tmp/wpas-wlan$i -Gadmin -Dnl80211 -iwlan$i -c $DIR/p2p$i.conf -ddKt > $DIR/logs/$DATE-log$i &
     done
+    chmod a+rx $HAPD
     sudo valgrind --log-file=$DIR/logs/$DATE-valgrind-hostapd $HAPD -ddKt -g /var/run/hostapd-global -G admin -ddKt > $DIR/logs/$DATE-hostapd &
 else
     for i in 0 1 2; do