update patch for compiler-rt path to be friendly to ports

Loong64 architecture is also supported upstream in this file (build/config/clang/BUILD.gn). Let's also handle it in our patch like aarch64, following the precedent. 😊

Also, there has been an Arch Linux for Loong64 project since 1 year ago and has developed rapidly. This project originated from Felix Yan's archriscv initiative and is highly similar in maintenance approach, closely collaborating with archriscv while sharing the same philosophical principles. It aims to stay as close as possible to the upstream Arch Linux and frequently receives guidance from @felixonmars . Merging this PR will help reduce the additional patches required for the project.