Move lguest guest support to arch/x86.

Lguest has two sides: host support (to launch guests) and guest
support (replacement boot path and paravirt_ops).  This moves the
guest side to arch/x86/lguest where it's closer to related code.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Andi Kleen <ak@suse.de>
diff --git a/arch/x86/lguest/Makefile b/arch/x86/lguest/Makefile
new file mode 100644
index 0000000..27f0c9e
--- /dev/null
+++ b/arch/x86/lguest/Makefile
@@ -0,0 +1 @@
+obj-y		:= i386_head.o boot.o