修改signal模块默认log级别

src/signal.c

@@ -23,7 +23,7 @@
 #endif
 
 #define DBG_TAG    "SIGN"
-#define DBG_LVL           DBG_INFO
+#define DBG_LVL           DBG_WARNING
 #include <rtdbg.h>
 
 #define sig_mask(sig_no)    (1u << sig_no)