[llvm-branch-commits] MC: Refactor FT_Align fragments when linker relaxation is enabled (PR #149465)

[Fangrui Song via llvm-branch-commits]

MaskRay wrote:

Next steps:

* Allocate the fixed content as trailing data of the MCFragment by utilizing a special bump allocator (gnulib obstack)
* Delete MCFixup member variables from MCFragment. Instead, add a MCFragment pointer to MCFixup.

https://github.com/llvm/llvm-project/pull/149465