[NaCl SDK] nacl_io: Fix utime() on directories.

native_client_sdk/src/libraries/nacl_io/node.cc

Index: native_client_sdk/src/libraries/nacl_io/node.cc
diff --git a/native_client_sdk/src/libraries/nacl_io/node.cc b/native_client_sdk/src/libraries/nacl_io/node.cc
index b91726fb1199bbaee73fe10f7b61904a4a755f2b..d8c1e03f96432cf1657f8f66ecaa9b90eb711eb7 100644
--- a/native_client_sdk/src/libraries/nacl_io/node.cc
+++ b/native_client_sdk/src/libraries/nacl_io/node.cc
@@ -189,7 +189,7 @@ int Node::GetLinks() {
 }
 
 int Node::GetMode() {
-  return stat_.st_mode & ~S_IFMT;
+  return stat_.st_mode & 0777;
 }
 
 Error Node::GetSize(off_t* out_size) {
@@ -203,13 +203,12 @@ int Node::GetType() {
 
 void Node::SetType(int type) {
   assert((type & ~S_IFMT) == 0);
-  stat_.st_mode &= ~S_IFMT;
   stat_.st_mode |= type;
 }
 
 void Node::SetMode(int mode) {
-  assert((mode & S_IFMT) == 0);
-  stat_.st_mode &= S_IFMT;
+  assert((mode & ~0777) == 0);
+  stat_.st_mode &= ~0777;
   stat_.st_mode |= mode;
 }