Compiling Go against C interface

include/c/sk_surface.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 // EXPERIMENTAL EXPERIMENTAL EXPERIMENTAL EXPERIMENTAL
 // DO NOT USE -- FOR INTERNAL TESTING ONLY
 
 #ifndef sk_types_DEFINED
 #define sk_types_DEFINED
 
 #include <stdint.h>
 #include <stddef.h>
 
+#ifndef __cplusplus
+#include <stdbool.h>
+#endif
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 typedef uint32_t sk_color_t;
 
 #define sk_color_set_argb(a, r, g, b)   (((a) << 24) | ((r) << 16) | ((g) << 8) | (b))
 #define sk_color_get_a(c)               (((c) >> 24) & 0xFF)
 #define sk_color_get_r(c)               (((c) >> 16) & 0xFF)
 #define sk_color_get_g(c)               (((c) >>  8) & 0xFF)
@@ skipping 86 matching lines @@
 sk_canvas_t* sk_surface_get_canvas(sk_surface_t*);
 sk_image_t* sk_surface_new_image_snapshot(sk_surface_t*);
 
 #ifdef __cplusplus
     class SkCanvas;
     void sk_test_capi(SkCanvas*);
 }
 #endif
 
 #endif