[lld] r307039 - [ELF] - Simplify allocateHeaders(). NFC.

[George Rimar via llvm-commits]

>Nice!
>
>Do you need the llvm:: prefix?
>
>Cheers,
>Rafael

Actually no, but we always use prefix in LLD code for find_if,
should we remove it in all places then ?
(Honestly I am not sure. We never do "using namespace std",
so for consistency with std::find_if I would probably leave llvm::find_if,
it looks a bit more common for me).

The rest LLVM code uses both find_if/llvm::find_if forms even
if have using namespace llvm; in file.

George.