[lld] [lld] Respect LLD_BUILD_TOOLS (PR #126625)

[via llvm-commits]

https://github.com/davidgmbb created https://github.com/llvm/llvm-project/pull/126625

Taken from https://github.com/ziglang/zig-bootstrap/commit/f1b9ac4744d0e7e5b00f77c2d698ad7a590d7812

>From 524b283925480992c6e5989243d46b417825bb24 Mon Sep 17 00:00:00 2001
From: David Gonzalez Martin <davidgm94.work at protonmail.com>
Date: Mon, 10 Feb 2025 17:51:39 -0600
Subject: [PATCH] [lld] Respect LLD_BUILD_TOOLS

---
 lld/CMakeLists.txt | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lld/CMakeLists.txt b/lld/CMakeLists.txt
index 64c9f2380550928..61989c6cccf57bb 100644
--- a/lld/CMakeLists.txt
+++ b/lld/CMakeLists.txt
@@ -189,7 +189,10 @@ if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
 endif()
 
 add_subdirectory(Common)
-add_subdirectory(tools/lld)
+
+if (LLD_BUILD_TOOLS)
+    add_subdirectory(tools/lld)
+endif()
 
 if (LLVM_INCLUDE_TESTS)
   add_custom_target(LLDUnitTests)