Fix issues with latest GN

Change-Id: I9490479242a025fa1f5ff84a556ae43d8de4c19a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/332897
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>

AUTHORS

@@ -69,3 +69,4 @@ Zhuo Qingliang <zhuo.dev@gmail.com>
 Mainframe North <*@mainframe.co.uk>
 JetBrains <*@jetbrains.com>
 Vibe Inc <*@vibe.us>
+Scene Group Ltd. <*@scenegroup.co>

BUILD.gn

@@ -69,7 +69,11 @@ config("skia_public") {
 
 # Skia internal APIs, used by Skia itself and a few test tools.
 config("skia_private") {
-  visibility = [ ":*" ]
+  visibility = [
+    ":*",
+    "//modules/*",
+    "//experimental/*",
+  ]
 
   defines = [ "SK_GAMMA_APPLY_TO_A8" ]
   if (skia_enable_gpu) {

third_party/libsdl/BUILD.gn

@@ -187,7 +187,7 @@ third_party("libsdl") {
       "SDL_VIDEO_RENDER_OGL=1",
       "SDL_VIDEO_OPENGL_CGL=1",
     ]
-    libs += [
+    frameworks = [
       "Carbon.framework",
       "Cocoa.framework",
       "Foundation.framework",