Make both SK_API definition points identical and order independent.

BUILD.gn

 # Copyright 2016 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 declare_args() {
 }
 
 skia_public_includes = [
   "include/android",
+  "include/c",
   "include/codec",
   "include/config",
   "include/core",
   "include/effects",
   "include/gpu",
   "include/gpu/gl",
   "include/images",
   "include/pathops",
   "include/ports",
   "include/svg",
   "include/utils",
   "include/utils/mac",
   "include/xml",
-
-  "include/c",  # TODO: move back to top, order shouldn't matter
 ]
 
 # Skia public API, generally provided by :skia.
 config("skia_public") {
   include_dirs = skia_public_includes
   defines = [ "SKIA_DLL" ]
 }
 
 # Skia internal APIs, used by Skia itself and a few test tools.
 config("skia_private") {
@@ skipping 380 matching lines @@
         ":gm",
         ":gpu_tool_utils",
         ":skia",
         ":tool_utils",
         "//third_party/jsoncpp",
         "//third_party/libpng",
       ]
       testonly = true
     }
 }