[NaCl SDK] Add nacl_mounts to NaCl SDK build. Experimental for now.

native_client_sdk/src/libraries/nacl_mounts/kernel_handle.h

Index: native_client_sdk/src/libraries/nacl_mounts/kernel_handle.h
diff --git a/native_client_sdk/src/libraries/nacl_mounts/kernel_handle.h b/native_client_sdk/src/libraries/nacl_mounts/kernel_handle.h
index a3fb7e09776e717af195f4244780eb2ca3fb3dd7..141a788f24b21d08774b35eb186447e6f8e3cfa8 100644
--- a/native_client_sdk/src/libraries/nacl_mounts/kernel_handle.h
+++ b/native_client_sdk/src/libraries/nacl_mounts/kernel_handle.h
@@ -2,7 +2,6 @@
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
-
 #ifndef LIBRARIES_NACL_MOUNTS_KERNEL_HANDLE_H_
 #define LIBRARIES_NACL_MOUNTS_KERNEL_HANDLE_H_
 
@@ -32,7 +31,7 @@ class KernelHandle : public RefObject {
   friend class KernelObject;
   friend class KernelProxy;
   void Acquire() { RefObject::Acquire(); }
-  bool Release() { return RefObject::Release(); }
+  void Release() { RefObject::Release(); }
   DISALLOW_COPY_AND_ASSIGN(KernelHandle);
 };