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/utils/SkParsePath.cpp b/src/utils/SkParsePath.cpp
index 5acbe4e..6ad3aa0 100644
--- a/src/utils/SkParsePath.cpp
+++ b/src/utils/SkParsePath.cpp
@@ -4,8 +4,8 @@
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
-#include "SkParse.h"
-#include "SkParsePath.h"
+#include "include/utils/SkParse.h"
+#include "include/utils/SkParsePath.h"
 
 static inline bool is_between(int c, int min, int max) {
     return (unsigned)(c - min) <= (unsigned)(max - min);
@@ -204,9 +204,9 @@
 
 ///////////////////////////////////////////////////////////////////////////////
 
-#include "SkGeometry.h"
-#include "SkString.h"
-#include "SkStream.h"
+#include "include/core/SkStream.h"
+#include "include/core/SkString.h"
+#include "src/core/SkGeometry.h"
 
 static void write_scalar(SkWStream* stream, SkScalar value) {
     char buffer[64];