Move gl_Bench into a dep so that it can be re-used among tests

client/site_tests/gl_Bench/gl_Bench.py

Index: client/site_tests/gl_Bench/gl_Bench.py
diff --git a/client/site_tests/gl_Bench/gl_Bench.py b/client/site_tests/gl_Bench/gl_Bench.py
index f82711520e344be47dad3a4fba7fcf134fc8499b..56cab634b58d17cabf93cb4928d94df79be990b4 100644
--- a/client/site_tests/gl_Bench/gl_Bench.py
+++ b/client/site_tests/gl_Bench/gl_Bench.py
@@ -12,13 +12,15 @@ class gl_Bench(test.test):
   preserve_srcdir = True
 
   def setup(self):
-      os.chdir(self.srcdir)
-      utils.system('make clean')
-      utils.system('make')
+      self.job.setup_dep(['glbench'])
 
 
   def run_once(self, options=''):
-      exefile = os.path.join(self.bindir, 'gl_Bench')
+      dep = 'glbench'
+      dep_dir = os.path.join(self.autodir, 'deps', dep)
+      self.job.install_pkg(dep, 'dep', dep_dir)
+
+      exefile = os.path.join(self.autodir, 'deps/glbench/glbench')
       cmd = "X :1 & sleep 1; DISPLAY=:1 %s %s; kill $!" % (exefile, options)
       self.results = utils.system_output(cmd, retain_output=True)