tree a30bd0f415fb29eda6b1c67c44032a2ad660e371
parent 326657f5679889e3374354ba3243e27bda2080f4
author Fangrui Song <i@maskray.me> 1714421518 -0700
committer GitHub <noreply@github.com> 1714421518 -0700
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[BinaryFormat] Adjust OSABI functions and add unittests

Adjust #89280:

* ELFOSABI_LINUX is a historical alias that should not be used in new
  code. readelf -h displays "UNIX - GNU" instead of "Linux".
* "OS" is inappropriate. Some values are architecture-specific, e.g.
  ELFOSABI_ARM.
* Drop lowercase, which seems a job of the caller.

Add some unittests.

Pull Request: https://github.com/llvm/llvm-project/pull/90270