Adding the dependencies for mpstat, which is part of the sysstat package.

Review URL: http://codereview.chromium.org/661240
diff --git a/client/tests/netperf2/netperf2.py b/client/tests/netperf2/netperf2.py
index f8857c2..6f283f8 100644
--- a/client/tests/netperf2/netperf2.py
+++ b/client/tests/netperf2/netperf2.py
@@ -7,7 +7,7 @@
 NETPERF_IX = 1
 
 class netperf2(test.test):
-    version = 3
+    version = 4
 
     # ftp://ftp.netperf.org/netperf/netperf-2.4.4.tar.gz
     def setup(self, tarball = 'netperf-2.4.4.tar.gz'):
@@ -25,6 +25,8 @@
         utils.system('make')
         utils.system('sync')
 
+        self.job.setup_dep(['sysstat'])
+
 
     def initialize(self):
         self.server_prog = '%s&' % os.path.join(self.srcdir, 'src/netserver')
@@ -145,6 +147,9 @@
     def client(self, server_ip, test, test_time, num_streams,
                test_specific_args, cpu_affinity):
         args = '-H %s -t %s -l %d' % (server_ip, test, test_time)
+
+        mpstat = os.path.join(self.autodir + 'deps/sysstat/mpstat')
+
         if self.wait_time:
             args += ' -s %d ' % self.wait_time