fuchsia: Make sdch build.

sdch/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 config("sdch_config") {
   include_dirs = [ "open-vcdiff/src" ]
 }
 
 # gn orders flags on a target before flags from configs. The default config
 # adds -Wall, and these flags have to be after -Wall -- so they need to come
@@ skipping 41 matching lines @@
   ]
 
   configs += [ ":sdch_warnings" ]
   public_configs = [ ":sdch_config" ]
 
   deps = [
     "//base",
     "//third_party/zlib",
   ]
 
-  if (is_linux || is_android) {
+  if (is_linux || is_android || is_fuchsia) {
     include_dirs = [ "linux" ]
   } else if (is_ios) {
     include_dirs = [ "ios" ]
   } else if (is_mac) {
     include_dirs = [ "mac" ]
     defines = [ "OPEN_VCDIFF_USE_AUTO_PTR" ]
   } else if (is_win) {
     include_dirs = [ "win" ]
   }
 
@@ skipping 10 matching lines @@
       "sdch/logging_forward.h",
     ]
   } else {
     logging_file = rebase_path("logging_forward.h", root_build_dir)
     cflags = [
       "-include",
       logging_file,
     ]
   }
 }