Move lengthy tests from 'make runtests' to 'make runlongtests'

This reduces 'make runtests' from ~90 sec on a z620 to ~8 sec, which
is short enough we can run it as part of the continuous build.

BUG=chromium-os:26317
BRANCH=none
TEST=make && time make runtests && time make runlongtests

Change-Id: I8165efaf8b8290ca3c8f8da73e3f8a54c2bc19f9
Reviewed-on: https://gerrit.chromium.org/gerrit/40374
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
Commit-Queue: Randall Spangler <rspangler@chromium.org>
Tested-by: Randall Spangler <rspangler@chromium.org>
diff --git a/Makefile b/Makefile
index 0c7b0b8..f040ba4 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+# Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
@@ -137,6 +137,9 @@
 runtests:
 	$(Q)$(MAKE) -C tests runtests
 
+runlongtests:
+	$(MAKE) -C tests runlongtests
+
 runcgptmanagertests:
 	$(Q)$(MAKE) -C tests runcgptmanagertests