[libclc] [libclc][NFC] Update README.md to use runtime build (PR #158283)

[Wenju He via cfe-commits]

https://github.com/wenju-he created https://github.com/llvm/llvm-project/pull/158283

LLVM_ENABLE_PROJECTS=libclc is deprecated, see
https://github.com/llvm/llvm-project/blob/a2a9601ea49a/llvm/CMakeLists.txt#L223-L228

>From 79b3ef4f017fd87eec5d4142f0d7c65e005a9699 Mon Sep 17 00:00:00 2001
From: Wenju He <wenju.he at intel.com>
Date: Fri, 12 Sep 2025 14:01:42 +0200
Subject: [PATCH] [libclc][NFC] Update README.md to use runtime build

LLVM_ENABLE_PROJECTS=libclc is deprecated, see
https://github.com/llvm/llvm-project/blob/a2a9601ea49a/llvm/CMakeLists.txt#L223-L228
---
 libclc/README.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libclc/README.md b/libclc/README.md
index 34f329d861199..4f14066425d2d 100644
--- a/libclc/README.md
+++ b/libclc/README.md
@@ -31,8 +31,8 @@ more targets is welcome.
 
 For an in-tree build, Clang must also be built at the same time:
 ```
-$ cmake <path-to>/llvm-project/llvm/CMakeLists.txt -DLLVM_ENABLE_PROJECTS="libclc;clang" \
-    -DCMAKE_BUILD_TYPE=Release -G Ninja
+$ cmake <path-to>/llvm-project/llvm/CMakeLists.txt -DLLVM_ENABLE_PROJECTS="clang" \
+    -DLLVM_ENABLE_RUNTIMES="libclc" -DCMAKE_BUILD_TYPE=Release -G Ninja
 $ ninja
 ```
 Then install: