make clean should remove all the test programs too

Signed-off-by: Matthias Lederhofer <matled@gmx.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Makefile

@@ -1051,8 +1051,9 @@ dist-doc:
 
 clean:
 	rm -f *.o mozilla-sha1/*.o arm/*.o ppc/*.o compat/*.o xdiff/*.o \
-		test-chmtime$X test-genrandom$X $(LIB_FILE) $(XDIFF_LIB)
+		$(LIB_FILE) $(XDIFF_LIB)
 	rm -f $(ALL_PROGRAMS) $(BUILT_INS) git$X
+	rm -f $(TEST_PROGRAMS)
 	rm -f *.spec *.pyc *.pyo */*.pyc */*.pyo common-cmds.h TAGS tags
 	rm -rf autom4te.cache
 	rm -f configure config.log config.mak.autogen config.mak.append config.status config.cache