NetworkPkg:Replace unsafe string functions.

Replace unsafe string functions with new added safe string functions.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Zhang Lubo <lubo.zhang@intel.com>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>
Reviewed-by: Qiu Shumin <shumin.qiu@intel.com>
Reviewed-by: Jaben Carsey <jaben.carsey@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17887 6f19259b-4bc3-4df7-8a09-765794883524

NetworkPkg/IScsiDxe/IScsiConfig.c

@@ -2393,7 +2393,7 @@ IScsiFormCallback (
           NULL
           );
       } else {
-        AsciiStrCpy (Private->Current->SessionConfigData.TargetName, IScsiName);
+        AsciiStrCpyS (Private->Current->SessionConfigData.TargetName, ISCSI_NAME_MAX_SIZE, IScsiName);
       }
 
       break;