[gndoc] Update GN build arguments documentation

Roller-URL: https://cr-buildbucket.appspot.com/build/8675838654086123985
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I7aff2dc6d712e26e3a4b5416531f6c94f8291f40
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1715050
Commit-Queue: docs-roller@fuchsia-infra.iam.gserviceaccount.com <docs-roller@fuchsia-infra.iam.gserviceaccount.com>

docs/gen/build_arguments.md

diff --git a/docs/gen/build_arguments.md b/docs/gen/build_arguments.md
index 5c27453..901f381 100644
--- a/docs/gen/build_arguments.md
+++ b/docs/gen/build_arguments.md
@@ -969,12 +969,12 @@
 }
   static = {
   clang_rt = "lib/clang/23/lib/armv7-unknown-linux-gnueabihf/libclang_rt.lsan.a"
-  clang_rt_cxx = ""
+  clang_rt_cxx = "../../../../out/not-default/libclang_rt.lsan_cxx.a"
 }
 }
   tsan = {
   shared = {
-  clang_rt = "../../../../out/not-default/libclang_rt.tsan.so"
+  clang_rt = ""
 }
   static = {
   clang_rt = "../../../../out/not-default/libclang_rt.tsan.a"