[llvm] Add llvm-extract-bundle-entry to extend llvm-objcopy (PR #169386)

[Jacob Lambert via llvm-commits]

https://github.com/lamb-j commented:

LGTM, but we should wait for others to review as well

This allows us to get the behavior we want without modifying the expected behavior of stand-alone llvm-objdump. And it more closely mimics the behavior of the tools it's intending to replace (roc-obj-ls, roc-obj-extract)

https://github.com/llvm/llvm-project/pull/169386