Add android-x86.

config

diff --git a/config b/config
index 7a40df5..37f86b0 100755
--- a/config
+++ b/config
@@ -830,6 +830,7 @@
   beos-*) OUT="$GUESSOS" ;;
   x86pc-*-qnx6) OUT="QNX6-i386" ;;
   *-*-qnx6) OUT="QNX6" ;;
+  x86-*-android|i?86-*-android) OUT="android-x86" ;;
   armv[7-9]*-*-android) OUT="android-armv7" ;;
   *) OUT=`echo $GUESSOS | awk -F- '{print $3}'`;;
 esac