Switch to 32-bit-by-default host multilib build.

Also we don't need to force LLVM built from source, for we already force
LLVM to be built as 32-bit.

Bug: 13751317
Change-Id: Ifadf1988d28b60cb06316de50f5bdc1834f1acc0
diff --git a/CleanSpec.mk b/CleanSpec.mk
index a3b1a2c..c764204 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -233,6 +233,9 @@
 # Switching PRODUCT_RUNTIMES default for some devices
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
 
+# Switching to 32-bit-by-default host multilib build
+$(call add-clean-step, rm -rf $(HOST_OUT_INTERMEDIATES))
+
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************