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

client/deps/glbench/src.orig/main.cc

 // 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.
 
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/mman.h>
 
@@ skipping 617 matching lines @@
       test[i]();
       GLenum err = glGetError();
       if (err != 0)
         printf("# glGetError returned non-zero: 0x%x\n", err);
       DestroyContext();
     }
   } while (GetUTime() < done);
 
   return 0;
 }