[llvm] [dyndbg] Create .debug_llvm_dyndbg section without any section flags (PR #194855)

[Orlando Cazalet-Hyams via llvm-commits]

OCHyams wrote:

Closed in favour of https://github.com/llvm/llvm-project/pull/211524. I will be using `elf_section_properties`, but we still need to add something to prevent other flags getting mixed in

https://github.com/llvm/llvm-project/pull/194855