[clang] [llvm] [Offloading] Extend OffloadBinary format to support multiple metadata entries (PR #169425)

[Joseph Huber via llvm-commits]

jhuber6 wrote:

> FYI: I'm now updating `OffloadBinary.cpp` (`OffloadBinary::create`, `OffloadBinary::write`, etc..) to support new format.

Yeah, we'll probably just want to make the interface take an array reference, possibly a helper that takes a single one and turns it into an array of one for convenience

https://github.com/llvm/llvm-project/pull/169425