Use llvm::sys::fs::unique_file.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184908 91177308-0d34-0410-b5e6-96231b3b80d8
Remove the last use of PathWithStatus.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184909 91177308-0d34-0410-b5e6-96231b3b80d8
Remove forward declarations of sys::Path.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184911 91177308-0d34-0410-b5e6-96231b3b80d8
Don't use PathV1.h in ASTUnit.cpp.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184912 91177308-0d34-0410-b5e6-96231b3b80d8
Remove PathV1.h from CompilerInstance.cpp.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184913 91177308-0d34-0410-b5e6-96231b3b80d8