Update autotest tests to use make -j where possible.

client/site_tests/graphics_GLAPICheck/graphics_GLAPICheck.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 logging, os, re
 from autotest_lib.client.bin import site_login, site_ui_test
 from autotest_lib.client.common_lib import error, site_ui, utils
 
 class graphics_GLAPICheck(site_ui_test.UITest):
     version = 1
     preserve_srcdir = True
     error_message = ""
 
 
     def setup(self):
         os.chdir(self.srcdir)
-        utils.system('make clean')
-        utils.system('make all')
+        utils.make('clean')
+        utils.make('all')
 
 
     def __check_extensions(self, info, ext_entries):
         info_split = info.split()
         comply = True
         for extension in ext_entries:
             match = extension in info_split
             if not match:
                 self.error_message += " " + extension
                 comply = False
@@ skipping 136 matching lines @@
                                          self.error_message)
             else:
                 raise error.TestFail('gles_APICheck error: ' + result)
 
         # Check X11 extensions.
         self.error_message = ""
         check_result = self.__check_x_extensions(result)
         if not check_result:
             raise error.TestFail('X extensions insufficient:' +
                                  self.error_message)