Disable ART runtime for darwin

Change-Id: Icdad4f422bacc3f997f585df48cc6f1c2d7c7642
diff --git a/target/product/core_minimal.mk b/target/product/core_minimal.mk
index 313aee2..a6f9f41 100644
--- a/target/product/core_minimal.mk
+++ b/target/product/core_minimal.mk
@@ -59,7 +59,9 @@
 
 PRODUCT_RUNTIMES := runtime_libdvm_default
 ifneq (,$(filter userdebug eng, $(TARGET_BUILD_VARIANT)))
-    PRODUCT_RUNTIMES += runtime_libart
+    ifneq ($(HOST_OS),darwin)
+        PRODUCT_RUNTIMES += runtime_libart
+    endif
 endif
 
 $(call inherit-product, $(SRC_TARGET_DIR)/product/base.mk)