Plumbing though mode parameter to open, since fusefs can make use of it.

native_client_sdk/src/libraries/nacl_io/kernel_intercept.cc

Index: native_client_sdk/src/libraries/nacl_io/kernel_intercept.cc
diff --git a/native_client_sdk/src/libraries/nacl_io/kernel_intercept.cc b/native_client_sdk/src/libraries/nacl_io/kernel_intercept.cc
index 7d34517adae24cd0ade77786cf69521d264e8a3f..218c76fc10514fae396dc54bca8192f80f189385 100644
--- a/native_client_sdk/src/libraries/nacl_io/kernel_intercept.cc
+++ b/native_client_sdk/src/libraries/nacl_io/kernel_intercept.cc
@@ -221,9 +221,9 @@ int ki_umount(const char* path) {
   return s_state.kp->umount(path);
 }
 
-int ki_open(const char* path, int oflag) {
+int ki_open(const char* path, int oflag, mode_t mode) {
   ON_NOSYS_RETURN(-1);
-  return s_state.kp->open(path, oflag);
+  return s_state.kp->open(path, oflag, mode);
 }
 
 int ki_pipe(int pipefds[2]) {