[lld] [LLD] [test] Avoid printing timestamps past INT32_MAX with llvm-readobj (PR #81463)

[Martin Storsjö via llvm-commits]

mstorsjo wrote:

FWIW, I do know that it's possible to add lit conditionals, to conditionally test printing the larger timestamps, like clang has `%if !system-windows && clang-target-64-bits %{` in the corresponding test there. But I went the simpler way here (and I don't feel like that condition is entirely correct, even if it probably is accurate enough in practice), plus I'm not sure if we'd need to add more lit test features to check for in the lld test tree in order have a working conditional here.

https://github.com/llvm/llvm-project/pull/81463