Don't delete test output when "make clean" is run -- only when "make

clobber" is run.  (Thanks Thomas W. for pointing this out!)

Makefile.pre.in

@@ -1031,13 +1031,13 @@ rmtestturds:
 	-rm -f *.txt
 	-rm -f gb-18030-2000.xml
 
-clean: pycremoval rmtestturds
+clean: pycremoval
 	find . -name '*.o' -exec rm -f {} ';'
 	find . -name '*.s[ol]' -exec rm -f {} ';'
 	find $(srcdir)/build -name 'fficonfig.h' -exec rm -f {} ';' || true
 	find $(srcdir)/build -name 'fficonfig.py' -exec rm -f {} ';' || true
 
-clobber: clean
+clobber: clean rmtestturds
 	-rm -f $(BUILDPYTHON) $(PGEN) $(LIBRARY) $(LDLIBRARY) $(DLLLIBRARY) \
 		tags TAGS \
 		config.cache config.log pyconfig.h Modules/config.c