[Bugfix][TAT-64][FOTA]cant download repeatedly

Change-Id: I1b2ce005831fa81d258c36514e92c3a0c593f5ed
diff --git a/src/lynq/lib/liblynq-at-fota/lynq_at_fota.cpp b/src/lynq/lib/liblynq-at-fota/lynq_at_fota.cpp
index 148214c..1d95f60 100755
--- a/src/lynq/lib/liblynq-at-fota/lynq_at_fota.cpp
+++ b/src/lynq/lib/liblynq-at-fota/lynq_at_fota.cpp
@@ -86,7 +86,7 @@
         strcpy(g_put_path, string[9]);

     }

 

-    sprintf(g_cmd,"wget ftp://%s:%s@%s:%s%s%s",string[2],string[3],string[0],string[1],string[7],string[8]);

+    sprintf(g_cmd,"wget -c ftp://%s:%s@%s:%s%s%s",string[2],string[3],string[0],string[1],string[7],string[8]);

     RLOGD("g_cmd:%s\n", g_cmd);

     str_num = strlen(g_put_path);