Enable first part of kld's on amd64. This is known to not work right

yet, but building kld's is OK now and they can be loaded by kldload(2).
(but the machine will likely crash soon afterwards, a "minor" problem :-)

Brought to you by:  my injured knee (from moving)

sys/conf/files.amd64

@@ -128,6 +128,7 @@ isa/fd.c			optional	fdc
 isa/psm.c			optional	psm
 isa/syscons_isa.c		optional	sc
 isa/vga_isa.c			optional	vga
+kern/link_elf_obj.c		standard
 pci/agp_ali.c			optional	agp
 pci/agp_amd.c			optional	agp
 pci/agp_i810.c			optional	agp

sys/conf/kmod.mk

@@ -137,18 +137,24 @@ ${PROG}: ${FULLPROG}
 	${OBJCOPY} --strip-debug ${FULLPROG} ${PROG}
 .endif
 
+.if ${MACHINE_ARCH} != amd64
 ${FULLPROG}: ${KMOD}.kld
 	${LD} -Bshareable ${LDFLAGS} -o ${.TARGET} ${KMOD}.kld
 .if !defined(DEBUG_FLAGS)
 	${OBJCOPY} --strip-debug ${.TARGET}
 .endif
+.endif
 
 EXPORT_SYMS?=	NO
 .if ${EXPORT_SYMS} != YES
 CLEANFILES+=	${.OBJDIR}/export_syms
 .endif
 
+.if ${MACHINE_ARCH} != amd64
 ${KMOD}.kld: ${OBJS}
+.else
+${FULLPROG}: ${OBJS}
+.endif
 	${LD} ${LDFLAGS} -r -d -o ${.TARGET} ${OBJS}
 .if defined(EXPORT_SYMS)
 .if ${EXPORT_SYMS} != YES
@@ -164,6 +170,9 @@ ${KMOD}.kld: ${OBJS}
 	xargs -J% ${OBJCOPY} % ${.TARGET}
 .endif
 .endif
+.if !defined(DEBUG_FLAGS) && ${MACHINE_ARCH} == amd64
+	${OBJCOPY} --strip-debug ${.TARGET}
+.endif
 
 _ILINKS=@ machine