fix cascading define issue for iOS with Delphi

CryptoLib/src/Include/CryptoLib.inc

@@ -183,7 +183,9 @@
 {$ENDIF}
 
 {$IFDEF MACOS}
-   {$DEFINE CRYPTOLIB_MACOS}
+   {$IFNDEF IOS}
+      {$DEFINE CRYPTOLIB_MACOS}
+   {$ENDIF}
 {$ENDIF}
 
 {$IFDEF ANDROID}