Actually enable 32bit builds.

This only works with paravirt so far.  Need to create a kernel .config for
x86.

Makefile

@@ -49,6 +49,10 @@ DOWNLOAD_DIR = .downloads
 -include $(profile).cfg
 
 inroot := chroot $(CHROOT)
+ifeq ($(ARCH),x86)
+	inroot := linux32 $(inroot)
+endif
+
 stage4-exists := $(wildcard $(STAGE4_TARBALL))
 software-deps := stage3
 
@@ -148,8 +152,8 @@ else
 endif
 	touch stage3
 
-compile_options: portage make.conf locale.gen $(PACKAGE_FILES)
-	cp make.conf $(CHROOT)/etc/portage/make.conf
+compile_options: portage make.conf.$(ARCH) locale.gen $(PACKAGE_FILES)
+	cp make.conf.$(ARCH) $(CHROOT)/etc/portage/make.conf
 ifdef PKGDIR
 	echo PKGDIR="/var/portage/packages" >> $(CHROOT)/etc/portage/make.conf
 endif

make.conf.x86

@@ -0,0 +1,14 @@
+CFLAGS="-Os"
+CXXFLAGS="-Os"
+CHOST="i686-pc-linux-gnu"
+MAKEOPTS="-j2"
+USE="-* nptl pam unicode"
+ALSA_PCM_PLUGINS="*"
+CLEAN_DELAY="0"
+EMERGE_WARNING_DELAY="0"
+AUTO_CLEAN="yes"
+EPAUSE_IGNORE="1"
+EMERGE_DEFAULT_OPTS="--jobs=2 --autounmask=n"
+FEATURES="noinfo -test nodoc noman unmerge-orphans buildpkg notitles parallel-fetch"
+CURL_SSL="openssl"
+PYTHON_TARGETS="python2_7"