[compiler-rt] Support in GetInstructionSize instructions used by Wine. (PR #113085)

[via llvm-commits]

bernhardu wrote:

v4:
- rebase over the recent fix 8417f6a
- add a few more instructions found when trying more applications.

@zmodem Thanks for the offer, and sorry for the delay.
I wonder if this has chances to go in, as it targets not a native windows platform?
And for "41 b8 XX XX XX XX : mov r8d, XX XX XX XX" I am not sure if it should
also consider rel_offset, but I don't know how to test this.

https://github.com/llvm/llvm-project/pull/113085