[compiler-rt] [compiler-rt] Add clang_rt library path to LIB env var for profile lit (PR #217189)

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<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-pgo

Author: jinge90

<details>
<summary>Changes</summary>

When trying to add more tests to compiler-rt profile lit test suite on Windows, we encountered linker error complaining profile lib couldn't be found. This PR followed asan lit.cfg.py approach to add compiler-rt path to LIB env var.

---
Full diff: https://github.com/llvm/llvm-project/pull/217189.diff


1 Files Affected:

- (modified) compiler-rt/test/profile/lit.cfg.py (+5) 


``````````diff
diff --git a/compiler-rt/test/profile/lit.cfg.py b/compiler-rt/test/profile/lit.cfg.py
index a6168cc4c4ceb..c7109747b85e5 100644
--- a/compiler-rt/test/profile/lit.cfg.py
+++ b/compiler-rt/test/profile/lit.cfg.py
@@ -32,6 +32,11 @@ def get_required_attr(config, attr_name):
 
 target_is_msvc = bool(re.match(r".*-windows-msvc$", config.target_triple))
 
+if target_is_msvc:
+    config.environment["LIB"] = os.path.pathsep.join(
+        [config.compiler_rt_libdir, config.environment.get("LIB", "")]
+    )
+
 if config.target_os in ["Linux"]:
     extra_link_flags = ["-ldl"]
 elif target_is_msvc:

``````````

</details>


https://github.com/llvm/llvm-project/pull/217189