Fix kernel symbols for multiboot2
Previous version just provided the ELF section table, which is correct
as far as the multiboot 2 specification is concerned.
But in order to retreive kernel symboles, the NetBSD kernelneeds symbol
table and string table sections to be loaded in memory, and have an
address set in the section table.
Requires change: Add kernel symbols for multiboot1
src/sys/arch/i386/stand/lib/exec_multiboot1.c 1.2 - 1.3
src/sys/arch/i386/stand/lib/libi386.h 1.45 - 1.46
UnifiedSplitRaw
