rewrite includes to not need so much -Ifoo

Current strategy: everything from the top

Things to look at first are the manual changes:

   - added tools/rewrite_includes.py
   - removed -Idirectives from BUILD.gn
   - various compile.sh simplifications
   - tweak tools/embed_resources.py
   - update gn/find_headers.py to write paths from the top
   - update gn/gn_to_bp.py SkUserConfig.h layout
     so that #include "include/config/SkUserConfig.h" always
     gets the header we want.

No-Presubmit: true
Change-Id: I73a4b181654e0e38d229bc456c0d0854bae3363e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/209706
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Hal Canary <halcanary@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
diff --git a/src/c/sk_surface.cpp b/src/c/sk_surface.cpp
index 36894e0..4d73ecf 100644
--- a/src/c/sk_surface.cpp
+++ b/src/c/sk_surface.cpp
@@ -5,23 +5,23 @@
  * found in the LICENSE file.
  */
 
-#include "SkCanvas.h"
-#include "SkData.h"
-#include "SkImage.h"
-#include "SkMaskFilter.h"
-#include "SkMatrix.h"
-#include "SkPaint.h"
-#include "SkPath.h"
-#include "SkPictureRecorder.h"
-#include "SkSurface.h"
+#include "include/core/SkCanvas.h"
+#include "include/core/SkData.h"
+#include "include/core/SkImage.h"
+#include "include/core/SkMaskFilter.h"
+#include "include/core/SkMatrix.h"
+#include "include/core/SkPaint.h"
+#include "include/core/SkPath.h"
+#include "include/core/SkPictureRecorder.h"
+#include "include/core/SkSurface.h"
 
-#include "sk_canvas.h"
-#include "sk_data.h"
-#include "sk_image.h"
-#include "sk_paint.h"
-#include "sk_path.h"
-#include "sk_surface.h"
-#include "sk_types_priv.h"
+#include "include/c/sk_canvas.h"
+#include "include/c/sk_data.h"
+#include "include/c/sk_image.h"
+#include "include/c/sk_paint.h"
+#include "include/c/sk_path.h"
+#include "include/c/sk_surface.h"
+#include "src/c/sk_types_priv.h"
 
 const struct {
     sk_pixelgeometry_t fC;