Update the tests skipped with quicktest target.

Some tests that used to be slow are now fast, and there are brand new
slow tests.

Makefile.pre.in

@@ -727,9 +727,10 @@ buildbottest:	all platform
 		fi
 		$(TESTPYTHON) $(TESTPROG) $(TESTOPTS) -uall -rw
 
-QUICKTESTOPTS=	$(TESTOPTS) -x test_thread test_signal test_strftime \
-		test_unicodedata test_re test_sre test_select test_poll \
-		test_struct test_zlib
+QUICKTESTOPTS=	$(TESTOPTS) -x test_subprocess test_io test_lib2to3 \
+		test_multibytecodec test_urllib2_localnet test_itertools \
+		test_multiprocessing test_mailbox test_socket test_poll \
+		test_select test_zipfile
 quicktest:	all platform
 		-find $(srcdir)/Lib -name '*.py[co]' -print | xargs rm -f
 		-$(TESTPYTHON) $(TESTPROG) $(QUICKTESTOPTS)