fix build

Include prebuilt_internal.mk for host builds.

Change-Id: I750d6f71b3a2c67b11536babb8b39060005f4ff4
diff --git a/core/prebuilt.mk b/core/prebuilt.mk
index 445627e..027c80a 100644
--- a/core/prebuilt.mk
+++ b/core/prebuilt.mk
@@ -7,7 +7,7 @@
 ###########################################################
 
 ifdef LOCAL_IS_HOST_MODULE
-include $(BUILD_SYSTEM)/module_arch_supported.mk
+include $(BUILD_SYSTEM)/prebuilt_internal.mk
 else #!LOCAL_IS_HOST_MODULE
 # check if primary arch is supported
 include $(BUILD_SYSTEM)/module_arch_supported.mk