solve build_static_library with nothing issue

使用 android-ndk-r10d

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)
LOCAL_CFLAGS += -std=c99
LOCAL_EXPORT_LDLIBS += -llog

LOCAL_SRC_FILES += android/loghelp.c
LOCAL_SRC_FILES += android/jnihelp.c
LOCAL_MODULE := myutil
include $(BUILD_STATIC_LIBRARY)

以上没有任何东西生成。

在myutil前面加上lib即可：

LOCAL_MODULE := libmyutil