Revision 1058123

- Sync with Fedora: Fri Sep 30 2016 Josh Stone <jistone@redhat.com> - 1.12.0-1
  o Update to 1.12.0.
  o Always use --local-rust-root, even for bootstrap binaries.
  o Remove the rebuild conditional - the build system now figures it out.
  o Let minidebuginfo do its thing, since metadata is no longer a note.
  o Let rust build its own compiler-rt builtins again.