Fix Windows build.

TBR=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/531683002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23580 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/d8.h

@@ -12,6 +12,7 @@
 #include "src/v8.h"
 #else
 #include "include/v8.h"
+#include "src/base/compiler-specific.h"
 #endif  // !V8_SHARED
 
 namespace v8 {