build native tests for 32-bit and 64-bit

32-bit tests will build into /data/nativetest
64-bit tests will build into /data/nativetest64

Change-Id: I31492c7d1273ba18bb2577fae150008a214c3bf4
diff --git a/core/native_test.mk b/core/native_test.mk
index fc08f79..bc7f2e7 100644
--- a/core/native_test.mk
+++ b/core/native_test.mk
@@ -5,4 +5,6 @@
 
 include $(BUILD_SYSTEM)/target_test_internal.mk
 
+LOCAL_MULTILIB := both
+
 include $(BUILD_EXECUTABLE)
diff --git a/core/target_test_internal.mk b/core/target_test_internal.mk
index e531356..04dc489 100644
--- a/core/target_test_internal.mk
+++ b/core/target_test_internal.mk
@@ -14,6 +14,17 @@
 LOCAL_SHARED_LIBRARIES += libstlport
 endif
 
-ifndef LOCAL_MODULE_PATH
-LOCAL_MODULE_PATH := $(TARGET_OUT_DATA_NATIVE_TESTS)/$(LOCAL_MODULE)
+ifdef LOCAL_MODULE_PATH
+$(error $(LOCAL_PATH): Do not set LOCAL_MODULE_PATH when building test $(LOCAL_MODULE))
 endif
+
+ifdef LOCAL_MODULE_PATH_32
+$(error $(LOCAL_PATH): Do not set LOCAL_MODULE_PATH_32 when building test $(LOCAL_MODULE))
+endif
+
+ifdef LOCAL_MODULE_PATH_64
+$(error $(LOCAL_PATH): Do not set LOCAL_MODULE_PATH_64 when building test $(LOCAL_MODULE))
+endif
+
+LOCAL_MODULE_PATH_32 := $(TARGET_OUT_DATA_NATIVE_TESTS)/$(LOCAL_MODULE)
+LOCAL_MODULE_PATH_64 := $(TARGET_OUT_DATA_NATIVE_TESTS)64/$(LOCAL_MODULE)