[Bugfix][TAT-15][AT]Continuous fota upgrade failed

Change-Id: I2292810a38679b1f05c76d7a9cdf603a92da0fd0
diff --git a/src/lynq/framework/lynq-ril-service/src/fota/lynq_fota.cpp b/src/lynq/framework/lynq-ril-service/src/fota/lynq_fota.cpp
index d97a0ce..ef71fb5 100755
--- a/src/lynq/framework/lynq-ril-service/src/fota/lynq_fota.cpp
+++ b/src/lynq/framework/lynq-ril-service/src/fota/lynq_fota.cpp
@@ -152,7 +152,7 @@
             lynq_fota_md5_flag = -1;

             return 1;

         } 

-

+		system("flash_eraseall /dev/mtd41");

         while(( size = read(fd_down,delta_data,READ_BLOCK_SIZE))>0) {

             write(fd_target,delta_data,READ_BLOCK_SIZE);

             memset(delta_data,0,READ_BLOCK_SIZE);