Update autotest tests to use make -j where possible.

client/site_tests/hardware_Keyboard/hardware_Keyboard.py

 # Copyright (c) 2010 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.
 
 import glob, logging, os, sys, commands
 
 from autotest_lib.client.bin import test, utils
 from autotest_lib.client.common_lib import error
 
 class hardware_Keyboard(test.test):
@@ skipping 11 matching lines @@
                       'LeftControl', 'LeftAlt', 'Space', 'RightAlt',
                       'RightCtrl', 'Up', 'Down', 'Left', 'Right',
                       'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P',
                       'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L',
                       'Z', 'X', 'C', 'V', 'B', 'N', 'M']
     live_test_key = 'LeftMeta'
     preserve_srcdir = True
 
     def setup(self):
         os.chdir(self.srcdir)
-        utils.system('make')
+        utils.make()
 
     def _supported(self, event, key_name):
         cmd = os.path.join(self.srcdir, 'evtest') + ' ' + event
         cmd += ' -s ' + key_name
         (status, output) = commands.getstatusoutput(cmd)
         if status:
             logging.error('Unsupported Key : %s' % key_name)
             return False
         logging.info('%s : %s' % (key_name, output))
         return True
@@ skipping 24 matching lines @@
             raise error.TestError('Required key unsupported in %s' %
                                   high_key_event)
         # Test one live keystroke. Test will wait on user input.
         cmd = os.path.join(self.srcdir, 'evtest') + ' ' + high_key_event
         cmd += ' -k'
         (status, output) = commands.getstatusoutput(cmd)
         if status:
             raise error.TestError('Key Capture Test failed : %s' % output);
         if (output != hardware_Keyboard.live_test_key):
             raise error.TestError('Incorrect key pressed : %s' % output);