Additionally pull up following revision(s) (requested by rin in ticket #1173):

sys/kern/core_elf32.c: revision 1.67

Use <compat/netbsd32/netbsd32.h> instead of <machine/netbsd32_machdep.h>,
which is not intended for standalone use.

Compile tested for all ports with their own COMPAT_NETBSD32 codes:
aarch64, amd64, arm, mips64, sparc64, and algor64.

Should fix build failure for mips64 in netbsd-9, where netbsd32.h is not
included by other header files.

(martin)