llvm-project

5c17af41 - [clang-tools-extra][test] Ensure file is writeable after copying (#157728)

[clang-tools-extra][test] Ensure file is writeable after copying (#157728) After #157572, the invocation to clang-tidy fails w/ `Could not open <...>/crlf.cpp.tmp.dir/Inputs/crlf/crlf.cpp for writing` if run in an environment where the source tree is mounted read-only. This is because `cat` was creating a new file in a writeable dir, but running `cp` preserves the readonly file permissions from the source tree.