Compilation fix and warnings removal for non-Windows platforms in older Delphi versions

Author: wlandgraf

Source/Core/AWS.Lib.Collections.pas

@@ -189,7 +189,7 @@ destructor TOrderedDictionary<K, V>.Destroy;
 begin
   Clear;
 {$IFDEF AUTOREFCOUNT}
-  FItems..DisposeOf;
+  FItems.DisposeOf;
 {$ELSE}
   FItems.Free;
 {$ENDIF}

Source/Core/AWS.Runtime.HttpRequestMessageFactory.pas

@@ -137,8 +137,10 @@ constructor THttpWebRequestMessage.Create(AHttpClient: THttpClient; ARequestUri:
 
 destructor THttpWebRequestMessage.Destroy;
 begin
+{$IFNDEF AUTOREFCOUNT}
   if (FRequest <> nil) and FOwnsSourceStream then
     FRequest.SourceStream.Free;
+{$ENDIF}
   FHttpClient.Free;
   inherited;
 end;

Source/Core/AWS.SDKUtils.pas

@@ -640,7 +640,9 @@ class function TAWSSDKUtils.ExecuteHttpRequest(const AUri, ARequestType, AConten
         raise EWebException.Create(AUri, Response.StatusCode);
       Result := TEncoding.UTF8.GetString(StreamToBytes(Response.ContentStream));
     finally
+{$IFNDEF AUTOREFCOUNT}
       Request.SourceStream.Free;
+{$ENDIF}
     end;
   finally
     Client.Free;