For PR351:

For PR351:
* removeFile() -> sys::Path::destroyFile()
* remove extraneous toString() calls
* convert local variables representing path names from std::string to
  sys::Path
* Use sys::Path objects with FileRemove instead of std::string
* Use sys::Path methods for construction of path names

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19001 91177308-0d34-0410-b5e6-96231b3b80d8