windows.cfg: Updated comments. There are no functional changes.

Author: orbitcowboy

cfg/windows.cfg

@@ -1263,6 +1263,10 @@
       <valid>0:</valid>
     </arg>
   </function>
+  <!-- void CopyMemory(
+  _In_       PVOID  Destination,
+  _In_ const VOID   *Source,
+  _In_       SIZE_T Length); -->
   <function name="CopyMemory">
     <noreturn>false</noreturn>
     <leak-ignore/>