Fix the following CAS related test for Windows

[hjyamauchi]

Fix the following CAS related test for Windows

Clang :: ClangScanDeps/include-tree-with-pch.c

[hjyamauchi]

@swift-ci please test llvm

[hjyamauchi]

Existing failures

 Failed Tests (10):
   Clang :: BoundsSafety/AST/attributes_in_template_decls_attr_only_mode.cpp
   Clang :: BoundsSafety/CodeGen/arithmetic-ops-in-counted-by-assign-O2.c
   Clang :: ClangScanDeps/optimize-canonicalize-macros.m
   Clang :: Modules/GH154840.cpp
   LLVM :: Transforms/Coroutines/coro-retcon-frame-old.ll
   LLVM :: Transforms/Coroutines/coro-retcon-once-dynamic-nocleanup.ll
   LLVM :: Transforms/Coroutines/coro-retcon-once-dynamic.ll
   LLVM :: Transforms/Coroutines/coro-retcon-swift-coroFrameAlloc.ll
   LLVM :: Transforms/Coroutines/coro-split-swift_coroFrameAlloc.ll
   LLVM :: Transforms/PhaseOrdering/X86/excessive-unrolling.ll

eg. https://ci.swift.org/job/pr-apple-llvm-project-llvm-linux/1048/consoleText