[llvm-branch-commits] [llvm] [llvm-21][MC] Fix fragments for sections bigger than 4G (PR #169121)

[Fangrui Song via llvm-branch-commits]

MaskRay wrote:

While `sizeof(MCEncodedFragment)` has changed in the 21.x release, it should be acceptable as `MCFragment`s are internal, not used in an ABI boundary.

https://github.com/llvm/llvm-project/pull/169121