enable aarch64 and x86_64 build

src/main/scala/com/github/shadowsocks/Shadowsocks.scala

@@ -830,14 +830,6 @@ class Shadowsocks
 
     crash_recovery()
 
-    copyAssets(System.getABI)
-
-    val ab = new ArrayBuffer[String]
-    for (executable <- Shadowsocks.EXECUTABLES) {
-      ab.append("chmod 755 " + Path.BASE + executable)
-    }
-    Console.runCommand(ab.toArray)
-
   }
 
   private def recovery() {

src/main/scala/com/github/shadowsocks/utils/Utils.scala

@@ -68,8 +68,8 @@ object Utils {
   val DEFAULT_SHELL: String = "/system/bin/sh"
   val DEFAULT_ROOT: String = "/system/bin/su"
   val ALTERNATIVE_ROOT: String = "/system/xbin/su"
-  val DEFAULT_IPTABLES: String = "/data/data/com.github.shadowsocks/iptables"
-  val ALTERNATIVE_IPTABLES: String = "/system/bin/iptables"
+  val DEFAULT_IPTABLES: String = "/system/bin/iptables"
+  val ALTERNATIVE_IPTABLES: String = "/data/data/com.github.shadowsocks/iptables"
   val TIME_OUT: Int = -99
   var initialized: Boolean = false
   var hasRedirectSupport: Int = -1