Building apk for multiple architecture

productFlavors {
    defaultFlavor {
        proguardFile 'proguard-rules.txt'    }
    x86 {
        versionCode Integer.parseInt("6" + defaultConfig.versionCode)
        ndk {
            abiFilter "x86"        }
    }
    mips {
        versionCode Integer.parseInt("4" + defaultConfig.versionCode)
        ndk {
            abiFilter "mips"        }
    }
    armv7 {
        versionCode Integer.parseInt("2" + defaultConfig.versionCode)
        ndk {
            abiFilter "armeabi-v7a"        }
    }
    arm {
        versionCode Integer.parseInt("1" + defaultConfig.versionCode)
        ndk {
            abiFilter "armeabi"        }
    }
}