hostapd: Add CONFIG_WPA_CLI_EDIT to defconfig

As hostapd_cli now supports command completion add documentation
of the config option to defconfig. Disabled per default.

Signed-off-by: Mikael Kanstrup <mikael.kanstrup@sonymobile.com>

hostapd/defconfig

@@ -348,3 +348,7 @@ CONFIG_IPV6=y
 # Note: This is an experimental and not yet complete implementation. This
 # should not be enabled for production use.
 #CONFIG_FILS=y
+
+# Include internal line edit mode in hostapd_cli. This can be used to provide
+# limited command line editing and history support.
+#CONFIG_WPA_CLI_EDIT=y