/usr/include/llvm-3.5/llvm/Object/ is in llvm-3.5-dev 1:3.5~svn201651-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/llvm-3.5/llvm/Object/Archive.h
/usr/include/llvm-3.5/llvm/Object/Binary.h
/usr/include/llvm-3.5/llvm/Object/COFF.h
/usr/include/llvm-3.5/llvm/Object/COFFYAML.h
/usr/include/llvm-3.5/llvm/Object/ELF.h
/usr/include/llvm-3.5/llvm/Object/ELFObjectFile.h
/usr/include/llvm-3.5/llvm/Object/ELFTypes.h
/usr/include/llvm-3.5/llvm/Object/ELFYAML.h
/usr/include/llvm-3.5/llvm/Object/Error.h
/usr/include/llvm-3.5/llvm/Object/MachO.h
/usr/include/llvm-3.5/llvm/Object/MachOUniversal.h
/usr/include/llvm-3.5/llvm/Object/ObjectFile.h
/usr/include/llvm-3.5/llvm/Object/RelocVisitor.h
/usr/include/llvm-3.5/llvm/Object/YAML.h