Create mips64el-linux-android directory to avoid NDK build issue on old AGP

gistfile1.gradle

// This script is for avoiding NDK build issue on old AGP.
gradle.beforeProject {
    Properties properties = new Properties()
    properties.load(rootProject.file("local.properties").newDataInputStream())
    def ndkPath = properties.getProperty("ndk.dir", null)
    if (ndkPath == null) {
        println("ndk.dir should be set in local.properties.")
        return
    }
    def arm64Path = ndkPath + File.separator + 'toolchains' + File.separator + 'aarch64-linux-android-4.9'
    def mips64Path = ndkPath + File.separator + 'toolchains' + File.separator + 'mips64el-linux-android'
    println ("Create ${mips64Path} from ${arm64Path}\n")
    copy {
        from arm64Path
        into mips64Path
    }
}