Move libmp3lame into the lame directory

This is where it would be in the original library structure
and makes the CMakeLists.txt a tad cleaner.

lib-src/lame/libmp3lame/newmdct.h

@@ -0,0 +1,27 @@
+/*
+ *	New Modified DCT include file
+ *
+ *	Copyright (c) 1999 Takehiro TOMINAGA
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef LAME_NEWMDCT_H
+#define LAME_NEWMDCT_H
+
+void    mdct_sub48(lame_internal_flags * gfc, const sample_t * w0, const sample_t * w1);
+
+#endif /* LAME_NEWMDCT_H */