[lld] [LLD][COFF] Set __guard_flags to CF_INSTRUMENTED if any object is instrumented (PR #115374)

[Jacek Caban via llvm-commits]

cjacek wrote:

Note that this patch only concerns the `CF_INSTRUMENTED` flag. It does not make LLD emit function tables or set the `CF_FUNCTION_TABLE_PRESENT` flag, so as far as I understand, it won’t have any functional impact. I’m not sure what might be special about mingw-w64 here; if this were an issue, it would likely affect MSVC as well.

https://github.com/llvm/llvm-project/pull/115374