Error: Your project contains C++ files but it is not using a supported native build system

Error:
Your project contains C++ files but it is not using a supported native build system 
http://stackoverflow.com/questions/40065871/error-your-project-contains-c-files-but-it-is-not-using-a-supported-native-bu
Put this part in 

build.gradle(Module:app)

 above 

buildTypes{}

sourceSets {
main {
jni.srcDirs = []
}
}

buildTypes{
}

This is the solution you need if you don't need recompilation of C sources. Requires .so to already be built.