[compiler-rt] [compiler-rt] fix gcc 12 support by removing enum-type-specifier (PR #165034)

[Yuxuan Chen via llvm-commits]

yuxuanchen1997 wrote:

> If you want to make this ABI compliant, I think that we should revert the change to the struct to use the `unsigned int`.

Would be in favor of that solution.

https://github.com/llvm/llvm-project/pull/165034