[Bugfix][API-835][At-extension]client connection failed.

Change-Id: I54fcffdc2a52a8c9e2f1fc2127209c15e39f39c2
diff --git a/src/lynq/lib/liblynq-at-extension/lynq_at.cpp b/src/lynq/lib/liblynq-at-extension/lynq_at.cpp
index 28d9a4a..80c6588 100755
--- a/src/lynq/lib/liblynq-at-extension/lynq_at.cpp
+++ b/src/lynq/lib/liblynq-at-extension/lynq_at.cpp
@@ -95,7 +95,7 @@
     if (connect(sockfd, (struct sockaddr *) &addr_server, sizeof(struct sockaddr_un)) < 0)
     {
         close(sockfd);
-        LYDBGLOG("Can't connect to server side, path: %s, errno:%d", name, errno);
+        LYDBGLOG("Can't connect to server side, path: %s, %s", name, strerror(errno));
         return -1;
     }
     LYINFLOG("[%d][%s] connect %s success",LINE,FUNC,name);