Use absolute path to smartctl(8)

--- src/gsc_settings.h.orig
+++ src/gsc_settings.h
@@ -32,7 +32,7 @@ inline void init_default_settings()
 
 
 #ifndef _WIN32
-	rconfig::set_default_data("system/smartctl_binary", "smartctl");  // must be in PATH or use absolute path.
+	rconfig::set_default_data("system/smartctl_binary", "${LOCALBASE}/sbin/smartctl");  // must be in PATH or use absolute path.
 	rconfig::set_default_data("system/tw_cli_binary", "tw_cli");  // must be in PATH or use absolute path.
 #else
 	rconfig::set_default_data("system/smartctl_binary", "smartctl-nc.exe");  // use no-console version by default.
