Issue #12205: Fix test_subprocess failure due to uninstalled test data.

Makefile.pre.in

@@ -841,7 +841,7 @@ 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/data \
-		test/cjkencodings test/decimaltestdata \
+		test/cjkencodings test/decimaltestdata test/subprocessdata \
 		test/tracedmodules \
 		encodings \
 		email email/mime email/test email/test/data \

Misc/NEWS

@@ -421,6 +421,8 @@ Build
 Tests
 -----
 
+- Issue #12205: Fix test_subprocess failure due to uninstalled test data.
+
 - Issue #11614: import __hello__ prints "Hello World!". Patch written by
   Andreas Stührk.