我把libs 目录删除掉，无法生成so

[tianshaokai]

Android NDK: WARNING: APP_PLATFORM android-14 is higher than android:minSdkVersion 1 in ./AndroidManifest.xml. NDK binaries will not be comptible with devices older than android-14. See https://android.googlesource.com/platform/ndk/+/master/docs/user/common_problems.md for more information.
/Users/xiaopeng/Android/Sdk/ndk-bundle/build/core/setup-app.mk:81: Android NDK: Application targets deprecated ABI(s): armeabi
/Users/xiaopeng/Android/Sdk/ndk-bundle/build/core/setup-app.mk:82: Android NDK: Support for these ABIs will be removed in a future NDK release.
jni/Android.mk:6: jni
/Users/xiaopeng/Android/Sdk/ndk-bundle/build/core/prebuilt-library.mk:45: *** Android NDK: Aborting . Stop.
Android NDK: ERROR:jni/Android.mk:avcodec: LOCAL_SRC_FILES points to a missing file
Android NDK: Check that jni/libavcodec-57.so exists or that its path is correct