[PATCH] D126812: [Binary] Promote OffloadBinary to inherit from Binary

[Joseph Huber via Phabricator via cfe-commits]

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We use the `OffloadBinary` to create binary images of offloading files
and their corresonding metadata. This patch changes this to inherit from
the base `Binary` class. This allows us to create and insepect these
more generically. This patch includes all the necessary glue to
implement this as a new binary format, along with added the magic bytes
we use to distinguish the offloading binary to the `file_magic`
implementation.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D126812

Files:
  clang/lib/CodeGen/BackendUtil.cpp
  llvm/include/llvm-c/Object.h
  llvm/include/llvm/BinaryFormat/Magic.h
  llvm/include/llvm/Object/Binary.h
  llvm/include/llvm/Object/OffloadBinary.h
  llvm/lib/BinaryFormat/Magic.cpp
  llvm/lib/Object/Binary.cpp
  llvm/lib/Object/Object.cpp
  llvm/lib/Object/ObjectFile.cpp
  llvm/lib/Object/OffloadBinary.cpp

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