64-bit host multilib build.

Bug: 13751317
Change-Id: I98c0d593e441add79d51ec1b690c4abd3489a8cf
diff --git a/Android.mk b/Android.mk
index 2196d59..57185ca 100644
--- a/Android.mk
+++ b/Android.mk
@@ -151,7 +151,7 @@
 # host test targets
 
 .PHONY: test-art-host-vixl
-ifneq ($(BUILD_HOST_64bit),)
+ifneq ($(HOST_IS_64_BIT),)
 test-art-host-vixl: $(ANDROID_HOST_OUT)/bin/cctest_vixl
 	$(ANDROID_HOST_OUT)/bin/cctest_vixl --run_all
 	@echo vixl PASSED