Get "make install" working again after adding Lib/test/bad_coding.py

which can't be compiled.  Thanks to Mat Martineau for spotting the problem.

Makefile.pre.in

@@ -724,11 +724,11 @@ libinstall:	$(BUILDPYTHON) $(srcdir)/Lib/$(PLATDIR)
 	PYTHONPATH=$(DESTDIR)$(LIBDEST)  $(RUNSHARED) \
 		./$(BUILDPYTHON) -Wi -tt $(DESTDIR)$(LIBDEST)/compileall.py \
 		-d $(LIBDEST) -f \
-		-x 'badsyntax|site-packages' $(DESTDIR)$(LIBDEST)
+		-x 'bad_coding|badsyntax|site-packages' $(DESTDIR)$(LIBDEST)
 	PYTHONPATH=$(DESTDIR)$(LIBDEST) $(RUNSHARED) \
 		./$(BUILDPYTHON) -Wi -tt -O $(DESTDIR)$(LIBDEST)/compileall.py \
 		-d $(LIBDEST) -f \
-		-x 'badsyntax|site-packages' $(DESTDIR)$(LIBDEST)
+		-x 'bad_coding|badsyntax|site-packages' $(DESTDIR)$(LIBDEST)
 	-PYTHONPATH=$(DESTDIR)$(LIBDEST)  $(RUNSHARED) \
 		./$(BUILDPYTHON) -Wi -t $(DESTDIR)$(LIBDEST)/compileall.py \
 		-d $(LIBDEST)/site-packages -f \