Implement RtlCopyString() and RtlCopyWideString() routines

sdk/xtdk/rtlfuncs.h

@@ -110,6 +110,18 @@ RtlCopyMemory(OUT PVOID Destination,
               IN PCVOID Source,
               IN SIZE_T Length);
 
+XTAPI
+VOID
+RtlCopyString(IN PCHAR Destination,
+              IN PCCHAR Source,
+              IN ULONG Length);
+
+XTAPI
+VOID
+RtlCopyWideString(IN PWCHAR Destination,
+                  IN CONST PWCHAR Source,
+                  IN ULONG Length);
+
 XTAPI
 LARGE_INTEGER
 RtlDivideLargeInteger(IN LARGE_INTEGER Dividend,