[build] Move v8-platform.h into v8_config_headers

Also add v8_config_headers dependency to cctest_headers. This reduces
the number of gn check failures from 194 to 178.

Bug: v8:7330
Change-Id: I6453b9789503c9d8ca3ed6bbe94bce3e2a69653f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2712564
Auto-Submit: Dan Elphick <delphick@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72912}

BUILD.gn

@@ -2098,7 +2098,11 @@ v8_header_set("v8_version") {
 v8_header_set("v8_config_headers") {
   configs = [ ":internal_config" ]
 
-  sources = [ "include/v8config.h" ]
+  sources = [
+    "include/v8-platform.h",
+    "include/v8config.h",
+  ]
+
   deps = []
 
   if (v8_generate_external_defines_header) {
@@ -2514,7 +2518,6 @@ v8_source_set("v8_base_without_compiler") {
     "include/v8-inspector-protocol.h",
     "include/v8-inspector.h",
     "include/v8-metrics.h",
-    "include/v8-platform.h",
     "include/v8-profiler.h",
     "include/v8-unwinder-state.h",
     "include/v8-util.h",

test/cctest/BUILD.gn

@@ -60,6 +60,8 @@ v8_header_set("cctest_headers") {
     "../..:internal_config_base",
   ]
 
+  deps = [ "../..:v8_config_headers" ]
+
   sources = [ "cctest.h" ]
 }