[gndoc] Update GN build arguments documentation

Test: CQ

Change-Id: Ice25440afc97b43fe56154f980f5a8c2f5259aba
diff --git a/docs/gen/build_arguments.md b/docs/gen/build_arguments.md
index b2e2c66..a364de3 100644
--- a/docs/gen/build_arguments.md
+++ b/docs/gen/build_arguments.md
@@ -1505,13 +1505,13 @@
 
 ### skia_enable_fontmgr_custom
 
-**Current value (from the default):** `false`
+**Current value (from the default):** `true`
 
 From //third_party/skia/BUILD.gn:68
 
 ### skia_enable_fontmgr_custom_empty
 
-**Current value (from the default):** `true`
+**Current value (from the default):** `false`
 
 From //third_party/skia/BUILD.gn:69
 
@@ -1523,7 +1523,7 @@
 
 ### skia_enable_fontmgr_fuchsia
 
-**Current value (from the default):** `true`
+**Current value (from the default):** `false`
 
 From //third_party/skia/BUILD.gn:71
 
@@ -1684,7 +1684,7 @@
 
 From //.gn:26
 
-**Overridden from the default:** `false`
+**Overridden from the default:** `true`
 
 From //third_party/skia/BUILD.gn:63
 
@@ -1692,7 +1692,7 @@
 
 From //.gn:26
 
-**Overridden from the default:** `false`
+**Overridden from the default:** `true`
 
 From //third_party/skia/BUILD.gn:63
 
@@ -1732,7 +1732,7 @@
 
 From //.gn:28
 
-**Overridden from the default:** `false`
+**Overridden from the default:** `true`
 
 From //third_party/skia/BUILD.gn:24
 
@@ -1740,7 +1740,7 @@
 
 From //.gn:28
 
-**Overridden from the default:** `false`
+**Overridden from the default:** `true`
 
 From //third_party/skia/BUILD.gn:24
 
@@ -1764,7 +1764,7 @@
 
 ### skia_use_icu
 
-**Current value (from the default):** `false`
+**Current value (from the default):** `true`
 
 From //third_party/skia/gn/skia.gni:13
 
@@ -1792,7 +1792,7 @@
 
 From //.gn:29
 
-**Overridden from the default:** `false`
+**Overridden from the default:** `true`
 
 From //third_party/skia/BUILD.gn:30
 
@@ -1800,7 +1800,7 @@
 
 From //.gn:29
 
-**Overridden from the default:** `false`
+**Overridden from the default:** `true`
 
 From //third_party/skia/BUILD.gn:30
 
@@ -1834,7 +1834,7 @@
 
 From //.gn:30
 
-**Overridden from the default:** `false`
+**Overridden from the default:** `true`
 
 From //third_party/skia/BUILD.gn:64
 
@@ -1842,15 +1842,15 @@
 
 From //.gn:30
 
-**Overridden from the default:** `false`
+**Overridden from the default:** `true`
 
 From //third_party/skia/BUILD.gn:64
 
 ### skia_use_vulkan
 
-**Current value (from the default):** `true`
+**Current value (from the default):** `false`
 
-From //third_party/skia/BUILD.gn:86
+From //third_party/skia/BUILD.gn:88
 
 ### skia_use_wuffs
 
@@ -1864,7 +1864,7 @@
 
 From //.gn:31
 
-**Overridden from the default:** `false`
+**Overridden from the default:** `true`
 
 From //third_party/skia/BUILD.gn:38
 
@@ -1872,7 +1872,7 @@
 
 From //.gn:31
 
-**Overridden from the default:** `false`
+**Overridden from the default:** `true`
 
 From //third_party/skia/BUILD.gn:38
 
@@ -1956,7 +1956,7 @@
 ### thinlto_cache_dir
 ThinLTO cache directory path.
 
-**Current value (from the default):** `"arm64-shared/thinlto-cache"`
+**Current value (from the default):** `"linux_x64-shared/thinlto-cache"`
 
 From //build/config/lto/config.gni:16
 
diff --git a/zircon/docs/gen/build_arguments.md b/zircon/docs/gen/build_arguments.md
index f1d880a..f6cf89d 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-x64-lto.shlib/thinlto-cache"`
+**Current value (from the default):** `"user-arm64-lto/thinlto-cache"`
 
 From //public/gn/config/lto/BUILD.gn:22