[gndoc] Update GN build arguments documentation

Test: CQ

Change-Id: Icd666410bee23d54f54ff670a0c1934a670bf160
diff --git a/docs/gen/build_arguments.md b/docs/gen/build_arguments.md
index a364de3..26b1061 100644
--- a/docs/gen/build_arguments.md
+++ b/docs/gen/build_arguments.md
@@ -367,11 +367,10 @@
 From [//topaz/runtime/dart/dart_component.gni:51](https://fuchsia.googlesource.com/topaz/+/eb287aa9023af1db248212efbc5d44f772fc5a0c/runtime/dart/dart_component.gni#51)
 
 ### dart_component_kind
-Allow for deduping the VM between standalone, flutter_runner and dart_runner.
 
-**Current value (from the default):** `"shared_library"`
+**Current value (from the default):** `"static_library"`
 
-From //third_party/dart/runtime/runtime_args.gni:78
+From //third_party/dart/runtime/runtime_args.gni:80
 
 ### dart_core_snapshot_kind
 Controls the kind of core snapshot linked into the standalone VM. Using a
diff --git a/zircon/docs/gen/build_arguments.md b/zircon/docs/gen/build_arguments.md
index f6cf89d..dbdd184 100644
--- a/zircon/docs/gen/build_arguments.md
+++ b/zircon/docs/gen/build_arguments.md
@@ -256,7 +256,7 @@
 ### thinlto_cache_dir
 ThinLTO cache directory path.
 
-**Current value (from the default):** `"user-arm64-lto/thinlto-cache"`
+**Current value (from the default):** `"user-x64-thinlto.shlib/thinlto-cache"`
 
 From //public/gn/config/lto/BUILD.gn:22