Disable WITH_HOST_DALVIK on 64bit host builds.

Change-Id: I8cea32fe5541c3223e7f317245aab3061e8ad444
diff --git a/core/product_config.mk b/core/product_config.mk
index 7a27426..11336d8 100644
--- a/core/product_config.mk
+++ b/core/product_config.mk
@@ -164,11 +164,13 @@
 
 # Default to building dalvikvm on hosts that support it...
 ifeq ($(HOST_OS),linux)
+ifeq ($(BUILD_HOST_64bit),)
 # ... or if the if the option is already set
 ifeq ($(WITH_HOST_DALVIK),)
   WITH_HOST_DALVIK := true
 endif
 endif
+endif
 
 # ---------------------------------------------------------------
 # Include the product definitions.