Change the canonical way to include the C bindings headers to <mojo/bindings/*.h>.

mojo/public/c/include/mojo/bindings/message.h

Index: mojo/public/c/include/mojo/bindings/message.h
diff --git a/mojo/public/c/bindings/message.h b/mojo/public/c/include/mojo/bindings/message.h
similarity index 92%
rename from mojo/public/c/bindings/message.h
rename to mojo/public/c/include/mojo/bindings/message.h
index aa9e85c5ef4b051dc31a82cb5c303ac277f1ddda..438448dc35edeb275d6d509ec6aa5a7941ec2a04 100644
--- a/mojo/public/c/bindings/message.h
+++ b/mojo/public/c/include/mojo/bindings/message.h
@@ -2,15 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef MOJO_PUBLIC_C_BINDINGS_MESSAGE_H_
-#define MOJO_PUBLIC_C_BINDINGS_MESSAGE_H_
+#ifndef MOJO_PUBLIC_C_INCLUDE_MOJO_BINDINGS_MESSAGE_H_
+#define MOJO_PUBLIC_C_INCLUDE_MOJO_BINDINGS_MESSAGE_H_
 
+#include <mojo/bindings/struct.h>
+#include <mojo/bindings/validation.h>
 #include <mojo/macros.h>
 #include <stdint.h>
 
-#include "mojo/public/c/bindings/struct.h"
-#include "mojo/public/c/bindings/validation.h"
-
 MOJO_BEGIN_EXTERN_C
 
 #define MOJOM_MESSAGE_FLAGS_EXPECTS_RESPONSE ((uint32_t)(1 << 0u))
@@ -74,4 +73,4 @@ MojomValidationResult MojomMessage_ValidateResponse(const void* in_buf);
 
 MOJO_END_EXTERN_C
 
-#endif  // MOJO_PUBLIC_C_BINDINGS_MESSAGE_H_
+#endif  // MOJO_PUBLIC_C_INCLUDE_MOJO_BINDINGS_MESSAGE_H_