错误为：
Android.mk文件
c++的调用方法为：
include $(CLEAR_VARS)
LOCAL_MODULE := TestNdk
LOCAL_CPP_EXTENSION :=com_ndk_test_JniClient.cpp
include $(BUILD_SHARED_LIBRARY)
c中的调用方法：
另一个使用变量的方法，一直成功运行
c++正确的mk文件：
include $(CLEAR_VARS)
LOCAL_MODULE := TestSm3
LS_CPP=$(subst $(1)/,,$(wildcard $(1)/*.cpp))
LOCAL_SRC_FILES := $(call LS_CPP,$(LOCAL_PATH))
include $(BUILD_SHARED_LIBRARY)