[Lguest] lguest breaks i386 allmodconfig

[Jeff Garzik]

The following

	make ARCH=i386 allmodconfig && \
	make ARCH=i386 -sj5

on x86-64 produces the following build breakage at the post-build stage:

[...]
Root device is (9, 0)
Setup is 12504 bytes (padded to 12800 bytes).
System is 1883 kB
Kernel: arch/x86/boot/bzImage is ready  (#2)
ERROR: "LGUEST_PAGES_guest_gdt_desc" [drivers/lguest/lg.ko] undefined!
ERROR: "LGUEST_PAGES_host_gdt_desc" [drivers/lguest/lg.ko] undefined!
ERROR: "LGUEST_PAGES_host_cr3" [drivers/lguest/lg.ko] undefined!
ERROR: "LGUEST_PAGES_regs" [drivers/lguest/lg.ko] undefined!
ERROR: "LGUEST_PAGES_host_idt_desc" [drivers/lguest/lg.ko] undefined!
ERROR: "LGUEST_PAGES_guest_gdt" [drivers/lguest/lg.ko] undefined!
ERROR: "LGUEST_PAGES_host_sp" [drivers/lguest/lg.ko] undefined!
ERROR: "LGUEST_PAGES_regs_trapnum" [drivers/lguest/lg.ko] undefined!
ERROR: "LGUEST_PAGES_guest_idt_desc" [drivers/lguest/lg.ko] undefined!
[...]