[NaCl SDK] Refactor STATUSCODE_*

native_client_sdk/src/libraries/nacl_io/library.dsc

 {
   'TOOLS': ['clang-newlib', 'glibc', 'pnacl', 'linux', 'mac'],
   'SEARCH': [
     '.',
     'pepper',
     '../third_party/newlib-extras',
     'include',
   ],
   'TARGETS': [
     {
@@ skipping 201 matching lines @@
         "real_pepper_interface.h",
         "socket/fifo_packet.h",
         "socket/packet.h",
         "socket/socket_node.h",
         "socket/tcp_event_emitter.h",
         "socket/tcp_node.h",
         "socket/udp_event_emitter.h",
         "socket/udp_node.h",
         "socket/unix_event_emitter.h",
         "socket/unix_node.h",
+        "statuscode.h",
         "stream/stream_event_emitter.h",
         "stream/stream_fs.h",
         "stream/stream_node.h",
         "typed_fs_factory.h",
       ],
       'DEST': 'include/nacl_io',
     },
     {
       'FILES': [
         "arpa/inet.h",
@@ skipping 62 matching lines @@
         "all_interfaces.h",
         "define_empty_macros.h",
         "undef_macros.h",
       ],
       'DEST': 'include/nacl_io/pepper',
     }
   ],
   'DEST': 'src',
   'NAME': 'nacl_io',
 }