/usr/include/llvm-5.0/llvm/BinaryFormat/ is in llvm-5.0-dev 1:5.0.1-4.
This file is owned by root:root, with mode 0o755.
..
/usr/include/llvm-5.0/llvm/BinaryFormat/COFF.h
/usr/include/llvm-5.0/llvm/BinaryFormat/Dwarf.def
/usr/include/llvm-5.0/llvm/BinaryFormat/Dwarf.h
/usr/include/llvm-5.0/llvm/BinaryFormat/ELF.h
/usr/include/llvm-5.0/llvm/BinaryFormat/ELFRelocs/
/usr/include/llvm-5.0/llvm/BinaryFormat/ELFRelocs/AArch64.def
/usr/include/llvm-5.0/llvm/BinaryFormat/ELFRelocs/AMDGPU.def
/usr/include/llvm-5.0/llvm/BinaryFormat/ELFRelocs/ARM.def
/usr/include/llvm-5.0/llvm/BinaryFormat/ELFRelocs/AVR.def
/usr/include/llvm-5.0/llvm/BinaryFormat/ELFRelocs/BPF.def
/usr/include/llvm-5.0/llvm/BinaryFormat/ELFRelocs/Hexagon.def
/usr/include/llvm-5.0/llvm/BinaryFormat/ELFRelocs/Lanai.def
/usr/include/llvm-5.0/llvm/BinaryFormat/ELFRelocs/Mips.def
/usr/include/llvm-5.0/llvm/BinaryFormat/ELFRelocs/PowerPC.def
/usr/include/llvm-5.0/llvm/BinaryFormat/ELFRelocs/PowerPC64.def
/usr/include/llvm-5.0/llvm/BinaryFormat/ELFRelocs/RISCV.def
/usr/include/llvm-5.0/llvm/BinaryFormat/ELFRelocs/Sparc.def
/usr/include/llvm-5.0/llvm/BinaryFormat/ELFRelocs/SystemZ.def
/usr/include/llvm-5.0/llvm/BinaryFormat/ELFRelocs/WebAssembly.def
/usr/include/llvm-5.0/llvm/BinaryFormat/ELFRelocs/i386.def
/usr/include/llvm-5.0/llvm/BinaryFormat/ELFRelocs/x86_64.def
/usr/include/llvm-5.0/llvm/BinaryFormat/MachO.def
/usr/include/llvm-5.0/llvm/BinaryFormat/MachO.h
/usr/include/llvm-5.0/llvm/BinaryFormat/Magic.h
/usr/include/llvm-5.0/llvm/BinaryFormat/Wasm.h
/usr/include/llvm-5.0/llvm/BinaryFormat/WasmRelocs/
/usr/include/llvm-5.0/llvm/BinaryFormat/WasmRelocs/WebAssembly.def