CryptoPkg: Fix BaseCryptLib CrtWrapper strcpy

strcpy fails when strSource is closer than 4096 bytes after strDest.

This is caused by an overlap check in AsciiStrCpyS:
  //
  // 5. Copying shall not take place between objects that overlap.
  //
  SAFE_STRING_CONSTRAINT_CHECK (InternalSafeStringNoAsciiStrOverlap
  (Destination, DestMax, (CHAR8 *)Source, SourceLen + 1),
  RETURN_ACCESS_DENIED);

Since DestMax is MAX_STRING_SIZE (0x1000) and with a Source
that is in this area behind Destination, AsciiStrCpyS will fail
and strcpy will do nothing.

When called by CRYPTO_strdup in openssl this leads to uninitialzed
memory that gets accessed instead of the copied string.

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2817

Signed-off-by: Sebastian Witt <sebastian.witt@siemens.com>

CryptoPkg/Library/BaseCryptLib/SysCall/CrtWrapper.c

@@ -271,7 +271,7 @@ strcpy (
   const char  *strSource
   )
 {
-  AsciiStrCpyS (strDest, MAX_STRING_SIZE, strSource);
+  AsciiStrCpyS (strDest, AsciiStrnSizeS (strSource, MAX_STRING_SIZE), strSource);
   return strDest;
 }