sanity: fix include file due to previous re-location

(cherry picked from commit f771b05fe8f24bebe18962c4169176e47e099ef8)

modules/sanity/mod_sanity.h

@@ -32,7 +32,7 @@
 #define MOD_SANITY_CHK_H
 
 #include "../../str.h"
-#include "../sl/sl.h"
+#include "../../modules_s/sl/sl.h"
 #include "../../parser/msg_parser.h"
 
 #define SANITY_RURI_SIP_VERSION        (1<<0)