Print the names of the input files as ld processes them.
This fixes https://llvm.org/bugs/show_bug.cgi?id=27091.
At first when I saw that Config->Verbose already can be used to print input file list,
I thought that there is no need to add new option, but then realized that
- Users does not wan't to see all what Verbose prints when they want to see input files only.
- That is consistent with gold and can be already used by someone.
So that is good option to have I think.