Add utime implementation to libnacl

src/untrusted/nacl/BUILD.gn

 # Copyright (c) 2014 The Native ClientAuthors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 assert(current_os == "nacl", "This file contains untrusted code only.")
 
 static_library("nacl_dyncode_private") {
   cflags_c = []
   sources = [
     "dyncode_private.c",
@@ skipping 305 matching lines @@
       "stubs/tcdrain.c",
       "stubs/tcflow.c",
       "stubs/tcflush.c",
       "stubs/tcgetattr.c",
       "stubs/tcsendbreak.c",
       "stubs/tcsetattr.c",
       "stubs/times.c",
       "stubs/ttyname.c",
       "stubs/ttyname_r.c",
       "stubs/umask.c",
-      "stubs/utime.c",
       "stubs/vfork.c",
       "stubs/wait.c",
       "stubs/waitpid.c",
       "symlink.c",
       "sysconf.c",
       "tls.c",
       "truncate.c",
       "unlink.c",
+      "utime.c",
       "utimes.c",
       "write.c",
     ]
   }
 
   if (current_os != "glibc" && current_cpu == "arm") {
     sources += [ "aeabi_read_tp.S" ]
   }
 
   if (current_cpu == "pnacl") {
@@ skipping 105 matching lines @@
         "-Wno-self-assign",
         "-allow-asm",
       ]
     }
 
     deps = [
       "//native_client/build/config/nacl:nacl_base",
     ]
   }
 }