Migrate Yoga targets to raw_headers

Summary:
In "regular" header mode, Buck will symlink from `buck-out/` to the actual header file. This works fine with GCC and clang, but not with MSVC. Headers will be treated as different file, sidestepping `#pragma once` directives.

As a result, all kinds of symbols get declared twice, leading to compile errors.

Reviewed By: davidaurelio

Differential Revision: D15781947

fbshipit-source-id: a3b4e211b8b74b9ef44fc39471a3009b2cf47260

BUCK

@@ -17,9 +17,9 @@ TEST_COMPILER_FLAGS = BASE_COMPILER_FLAGS + GMOCK_OVERRIDE_FLAGS + [
 yoga_cxx_library(
     name = "yoga",
     srcs = glob(["yoga/**/*.cpp"]),
-    header_namespace = "",
-    exported_headers = subdir_glob([("", "yoga/**/*.h")]),
     compiler_flags = LIBRARY_COMPILER_FLAGS,
+    public_include_directories = ["."],
+    raw_headers = glob(["yoga/**/*.h"]),
     soname = "libyogacore.$(ext)",
     tests = [":YogaTests"],
     visibility = ["PUBLIC"],
@@ -31,9 +31,9 @@ yoga_cxx_library(
 yoga_cxx_library(
     name = "yogaForDebug",
     srcs = glob(["yoga/**/*.cpp"]),
-    header_namespace = "",
-    exported_headers = subdir_glob([("", "yoga/**/*.h")]),
     compiler_flags = TEST_COMPILER_FLAGS,
+    public_include_directories = ["."],
+    raw_headers = glob(["yoga/**/*.h"]),
     soname = "libyogacore.$(ext)",
     tests = [":YogaTests"],
     visibility = ["PUBLIC"],