make unittest allocator align to 64 bytes.

unit_test/unit_test.h

 /*
  *  Copyright 2011 The LibYuv Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS. All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 49 matching lines @@
       dst_width > kMaxWidth || dst_height > kMaxHeight) {
     printf("Warning - size too large to test.  Skipping\n");
     return false;
   }
   return true;
 }
 
 #define align_buffer_page_end(var, size)                                       \
   uint8* var;                                                                  \
   uint8* var##_mem;                                                            \
-  var##_mem = reinterpret_cast<uint8*>(malloc((((size) + 4095) & ~4095) +      \
-      OFFBY));                                                                 \
-  var = var##_mem + (-(size) & 4095) + OFFBY;
+  var##_mem = reinterpret_cast<uint8*>(malloc(((size) + 4095 + 63) & ~4095));  \
+  var = (uint8*)((intptr_t)(var##_mem + (((size) + 4095 + 63) & ~4095) -       \
+      (size)) & ~63);
 
 #define free_aligned_buffer_page_end(var) \
   free(var##_mem);  \
   var = 0;
 
 #ifdef WIN32
 static inline double get_time() {
   LARGE_INTEGER t, f;
   QueryPerformanceCounter(&t);
   QueryPerformanceFrequency(&f);
@@ skipping 107 matching lines @@
   int benchmark_iterations_;  // Default 1. Use 1000 for benchmarking.
   int benchmark_width_;  // Default 1280.  Use 640 for benchmarking VGA.
   int benchmark_height_;  // Default 720.  Use 360 for benchmarking VGA.
   int benchmark_pixels_div256_;  // Total pixels to benchmark / 256.
   int benchmark_pixels_div1280_;  // Total pixels to benchmark / 1280.
   int disable_cpu_flags_;  // Default 1.  Use -1 for benchmarking.
   int benchmark_cpu_info_;  // Default -1.  Use 1 to disable SIMD.
 };
 
 #endif  // UNIT_TEST_UNIT_TEST_H_  NOLINT