Fixed copyright notice

src/Cache.cpp

@@ -17,6 +17,8 @@ You should have received a copy of the GNU General Public License
 along with RandomX.  If not, see<http://www.gnu.org/licenses/>.
 */
 
+// Parts of this file are originally copyright (c) xmr-stak
+
 #include <cstring>
 #include "Cache.hpp"
 #include "softAes.h"

src/dataset.cpp

@@ -17,8 +17,6 @@ You should have received a copy of the GNU General Public License
 along with RandomX.  If not, see<http://www.gnu.org/licenses/>.
 */
 
-// Parts of this file are originally copyright (c) xmr-stak
-
 #include <new>
 #include <algorithm>
 #include <stdexcept>