Fix 32bit xen-tools build.

This fixes building 32bit xen-tools on a amd64 machine, i.e.
"XEN_TARGET_ARCH=x86_32 make".

For ioemu I've taken the lazy path and just disabled them for
cross-builds, I'll leave that to fix to someone who knows the
qemu makefiles better than I do ;)

Signed-off-by: Gerd Hoffmann <kraxel@suse.de>
---
 config/x86_32.mk |    6 ++++--
 tools/Makefile   |    2 +-
 2 files changed, 5 insertions(+), 3 deletions(-)

Index: build-32-unstable-12621/config/x86_32.mk
===================================================================
--- build-32-unstable-12621.orig/config/x86_32.mk
+++ build-32-unstable-12621/config/x86_32.mk
@@ -6,8 +6,10 @@ CONFIG_MIGRATE := y
 CONFIG_XCUTILS := y
 CONFIG_IOEMU := y
 
-CFLAGS += -m32 -march=i686
-LIBDIR := lib
+CFLAGS  += -m32 -march=i686
+LDFLAGS += -m32
+ASFLAGS += -m32
+LIBDIR  := lib
 
 # Use only if calling $(LD) directly.
 ifeq ($(XEN_OS),OpenBSD)
Index: build-32-unstable-12621/tools/Makefile
===================================================================
--- build-32-unstable-12621.orig/tools/Makefile
+++ build-32-unstable-12621/tools/Makefile
@@ -62,7 +62,7 @@ check_clean:
 	$(MAKE) -C check clean
 
 .PHONY: ioemu ioemuinstall ioemuclean
-ifeq ($(CONFIG_IOEMU),y)
+ifeq ($(XEN_COMPILE_ARCH)$(CONFIG_IOEMU),$(XEN_TARGET_ARCH)y)
 export IOEMU_DIR ?= ioemu
 ioemu ioemuinstall:
 	[ -f $(IOEMU_DIR)/config-host.mak ] || \