Add library test makefile solutions.

Change-Id: Ibc8df9b0e2342683158936bf011425780df8f02a
diff --git a/core/native_test.mk b/core/native_test.mk
index 12cf4af..fc08f79 100644
--- a/core/native_test.mk
+++ b/core/native_test.mk
@@ -3,20 +3,6 @@
 ## Common flags for native tests are added.
 ###########################################
 
-LOCAL_CFLAGS += -DGTEST_OS_LINUX_ANDROID -DGTEST_HAS_STD_STRING
-
-LOCAL_C_INCLUDES += external/gtest/include
-LOCAL_STATIC_LIBRARIES += libgtest libgtest_main
-
-ifndef LOCAL_SDK_VERSION
-LOCAL_C_INCLUDES += bionic \
-                    bionic/libstdc++/include \
-                    external/stlport/stlport
-LOCAL_SHARED_LIBRARIES += libstlport
-endif
-
-ifndef LOCAL_MODULE_PATH
-LOCAL_MODULE_PATH := $(TARGET_OUT_DATA_NATIVE_TESTS)/$(LOCAL_MODULE)
-endif
+include $(BUILD_SYSTEM)/target_test_internal.mk
 
 include $(BUILD_EXECUTABLE)