kernel build warning - XEN related

[Oliver Pinter]

Hi all!

I got this build warning with ~recent 11-CURRENT:

--- xen-locore.o ---
/usr/data/source/git/opBSD/opBSD.git/sys/amd64/amd64/xen-locore.S:45:1:
warning: DWARF2 only supports one section per compilation unit
.section __xen_guest
^
/usr/data/source/git/opBSD/opBSD.git/sys/amd64/amd64/xen-locore.S:46:2:
warning: DWARF2 only supports one section per compilation unit
 .pushsection .note.Xen ; .align 4 ; .long 2f - 1f ; .long 4f - 3f ;
.long 6 ; 1:.asciz "Xen" ; 2:.align 4 ; 3:.asciz "FreeBSD" ; 4:.align
4 ; .popsection
 ^
ctfconvert -L VERSION -g xen-locore.o