-o is in the documentation, but not in the llvm-dwarfdump help text. This patch adds it by inverting the -o and --out-file aliasing. It also removes --out-file from the documentation, since we don't really want people to be using this switch in practice. Reviewed by: aprantl, JDevlieghere, dblaikie Differential Revision: https://reviews.llvm.org/D63013 llvm-svn: 363044