Remove v8stdint.h, it doesn't serve a purpose anymore.

src/base/macros.h

 // Copyright 2014 the V8 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.
 
 #ifndef V8_BASE_MACROS_H_
 #define V8_BASE_MACROS_H_
 
+#include <stddef.h>
+#include <stdint.h>
+
 #include <cstring>
 
-#include "include/v8stdint.h"
 #include "src/base/build_config.h"
 #include "src/base/compiler-specific.h"
 #include "src/base/logging.h"
 
 
 // The expression OFFSET_OF(type, field) computes the byte-offset
 // of the specified field relative to the containing type. This
 // corresponds to 'offsetof' (in stddef.h), except that it doesn't
 // use 0 or NULL, which causes a problem with the compiler warnings
 // we have enabled (which is also why 'offsetof' doesn't seem to work).
@@ skipping 369 matching lines @@
 }
 
 
 // Return the smallest multiple of m which is >= x.
 template <typename T>
 inline T RoundUp(T x, intptr_t m) {
   return RoundDown<T>(static_cast<T>(x + m - 1), m);
 }
 
 #endif   // V8_BASE_MACROS_H_