Fix libwifi-system unit tests

Bug: 30311493
Change-Id: I117433e486d65e408ed523a4d5f10d0c49562399
Test: These pass again.
diff --git a/libwifi_system/tests/hostapd_manager_unittest.cpp b/libwifi_system/tests/hostapd_manager_unittest.cpp
index f8ebd99..048d473 100644
--- a/libwifi_system/tests/hostapd_manager_unittest.cpp
+++ b/libwifi_system/tests/hostapd_manager_unittest.cpp
@@ -37,7 +37,7 @@
 #define CONFIG_COMMON_PREFIX \
     "interface=foobar0\n" \
     "driver=nl80211\n" \
-    "ctrl_interface=/data/misc/wifi/hostapd\n" \
+    "ctrl_interface=/data/misc/wifi/hostapd/ctrl\n" \
     "ssid2=68656c6c6f" "6973" "6974" "6d65\n" \
     "channel=2\n" \
     "ieee80211n=1\n" \