Add missing header files to GN files (3 of N)

native_client_sdk/src/libraries/nacl_io/BUILD.gn

Index: native_client_sdk/src/libraries/nacl_io/BUILD.gn
diff --git a/native_client_sdk/src/libraries/nacl_io/BUILD.gn b/native_client_sdk/src/libraries/nacl_io/BUILD.gn
index 11ae14d7182c637c84cf30385ae0c8e80448ecf7..a4a1ed40aa39a777c498b745c381a21ff4d1e47c 100644
--- a/native_client_sdk/src/libraries/nacl_io/BUILD.gn
+++ b/native_client_sdk/src/libraries/nacl_io/BUILD.gn
@@ -20,33 +20,58 @@ config("nacl_io_include_dirs") {
 source_set("nacl_io") {
   sources = [
     "devfs/dev_fs.cc",
+    "devfs/dev_fs.h",
     "devfs/jspipe_event_emitter.cc",
+    "devfs/jspipe_event_emitter.h",
     "devfs/jspipe_node.cc",
+    "devfs/jspipe_node.h",
     "devfs/tty_node.cc",
+    "devfs/tty_node.h",
     "dir_node.cc",
+    "dir_node.h",
     "event_emitter.cc",
+    "event_emitter.h",
     "event_listener.cc",
+    "event_listener.h",
     "fifo_char.cc",
+    "fifo_char.h",
     "filesystem.cc",
+    "filesystem.h",
     "fusefs/fuse_fs.cc",
+    "fusefs/fuse_fs.h",
     "fusefs/fuse_fs_factory.cc",
+    "fusefs/fuse_fs_factory.h",
     "getdents_helper.cc",
+    "getdents_helper.h",
     "googledrivefs/googledrivefs.cc",
+    "googledrivefs/googledrivefs.h",
     "googledrivefs/googledrivefs_node.cc",
+    "googledrivefs/googledrivefs_node.h",
     "h_errno.c",
     "hash.cc",
     "host_resolver.cc",
+    "host_resolver.h",
     "html5fs/html5_fs.cc",
+    "html5fs/html5_fs.h",
     "html5fs/html5_fs_node.cc",
+    "html5fs/html5_fs_node.h",
     "httpfs/http_fs.cc",
+    "httpfs/http_fs.h",
     "httpfs/http_fs_node.cc",
+    "httpfs/http_fs_node.h",
     "in6_addr.c",
     "jsfs/js_fs.cc",
+    "jsfs/js_fs.h",
     "jsfs/js_fs_node.cc",
+    "jsfs/js_fs_node.h",
     "kernel_handle.cc",
+    "kernel_handle.h",
     "kernel_intercept.cc",
+    "kernel_intercept.h",
     "kernel_object.cc",
+    "kernel_object.h",
     "kernel_proxy.cc",
+    "kernel_proxy.h",
     "kernel_wrap_dummy.cc",
     "kernel_wrap_glibc.cc",
     "kernel_wrap_irt_ext.c",
@@ -54,29 +79,52 @@ source_set("nacl_io") {
     "kernel_wrap_win.cc",
     "log.c",
     "memfs/mem_fs.cc",
+    "memfs/mem_fs.h",
     "memfs/mem_fs_node.cc",
+    "memfs/mem_fs_node.h",
     "nacl_io.cc",
+    "nacl_io.h",
     "node.cc",
+    "node.h",
     "passthroughfs/passthrough_fs.cc",
+    "passthroughfs/passthrough_fs.h",
     "passthroughfs/real_node.cc",
+    "passthroughfs/real_node.h",
     "path.cc",
     "pepper_interface.cc",
+    "pepper_interface.h",
     "pepper_interface_delegate.cc",
+    "pepper_interface_delegate.h",
     "pipe/pipe_event_emitter.cc",
+    "pipe/pipe_event_emitter.h",
     "pipe/pipe_node.cc",
+    "pipe/pipe_node.h",
     "real_pepper_interface.cc",
+    "real_pepper_interface.h",
     "socket/fifo_packet.cc",
+    "socket/fifo_packet.h",
     "socket/packet.cc",
+    "socket/packet.h",
     "socket/socket_node.cc",
+    "socket/socket_node.h",
     "socket/tcp_event_emitter.cc",
+    "socket/tcp_event_emitter.h",
     "socket/tcp_node.cc",
+    "socket/tcp_node.h",
     "socket/udp_event_emitter.cc",
+    "socket/udp_event_emitter.h",
     "socket/udp_node.cc",
+    "socket/udp_node.h",
     "socket/unix_event_emitter.cc",
+    "socket/unix_event_emitter.h",
     "socket/unix_node.cc",
+    "socket/unix_node.h",
     "stream/stream_event_emitter.cc",
+    "stream/stream_event_emitter.h",
     "stream/stream_fs.cc",
+    "stream/stream_fs.h",
     "stream/stream_node.cc",
+    "stream/stream_node.h",
     "syscalls/access.c",
     "syscalls/chown.c",
     "syscalls/fchown.c",