[llvm-debuginfo-analyzer] Add support for Extended COFF (XCOFF) binary format.

[CarlosAlbertoEnciso]

Extracted from llvm/tools/llvm-debuginfo-analyzer/README.txt

Add support for Extended COFF (XCOFF) binary format.

[llvmbot]

@llvm/issue-subscribers-debuginfo

Author: Carlos Alberto Enciso (CarlosAlbertoEnciso)

Extracted from [llvm/tools/llvm-debuginfo-analyzer/README.txt](https://github.com/llvm/llvm-project/blob/main/llvm/tools/llvm-debuginfo-analyzer/README.txt)

Add support for Extended COFF (XCOFF) binary format.