Issue #18919: Add test/audiodata to LIBSUBDIRS.

Author: serhiy-storchaka

Makefile.pre.in

@@ -1010,6 +1010,7 @@ MACHDEPS=	$(PLATDIR) $(EXTRAPLATDIR)
 XMLLIBSUBDIRS=  xml xml/dom xml/etree xml/parsers xml/sax
 LIBSUBDIRS=	tkinter tkinter/test tkinter/test/test_tkinter \
 		tkinter/test/test_ttk site-packages test \
+		test/audiodata \
 		test/capath test/data \
 		test/cjkencodings test/decimaltestdata test/xmltestdata \
 		test/subprocessdata test/sndhdrdata test/support \