warning: DWARF2 only supports one section per compilation unit

[Andriy Gapon]

I've noticed many messages like the following during amd64 buildworld with very
recent head:

> warning: DWARF2 only supports one section per compilation unit
>  .section .note.GNU-stack,"",%progbits

Reported sections varied (e.g. there was .rodata).
The messages seem to be related to .s files.
I hope that those are harmless?

-- 
Andriy Gapon