bpo-37468: make install no longer install wininst-*.exe files (GH-14511)

make install no longer installs "wininst-*.exe" files used by
distutils bdist_wininst: bdist_wininst only works on Windows.
diff --git a/Makefile.pre.in b/Makefile.pre.in
index ef9a4f8..94a1208 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -1431,6 +1431,9 @@
 			*CVS) ;; \
 			*.py[co]) ;; \
 			*.orig) ;; \
+			# bpo-37468: Don't install distutils/command/wininst-*.exe files used \
+			# by distutils bdist_wininst: bdist_wininst only works on Windows. \
+			*wininst-*.exe) ;; \
 			*~) ;; \
 			*) \
 				if test -d $$i; then continue; fi; \