[llvm] [gn build] Port 7e91ef5d6aea (PR #226869)

[Nico Weber via llvm-commits]

https://github.com/nico created https://github.com/llvm/llvm-project/pull/226869

None

>From d707cff46fe05651a6a4a9fc8a10001b0b9bf800 Mon Sep 17 00:00:00 2001
From: Nico Weber <thakis at chromium.org>
Date: Sun, 27 Sep 2026 18:59:47 -0700
Subject: [PATCH] [gn build] Port 7e91ef5d6aea

---
 llvm/utils/gn/secondary/libcxx/include/BUILD.gn | 1 +
 1 file changed, 1 insertion(+)

diff --git a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
index 0221fcaa94180..45f658a964e0e 100644
--- a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
@@ -1362,6 +1362,7 @@ if (current_toolchain == default_toolchain) {
       "__pstl/cpu_algos/search.h",
       "__pstl/cpu_algos/search_n.h",
       "__pstl/cpu_algos/stable_sort.h",
+      "__pstl/cpu_algos/swap_ranges.h",
       "__pstl/cpu_algos/transform.h",
       "__pstl/cpu_algos/transform_reduce.h",
       "__pstl/cpu_algos/uninitialized_algorithms.h",