Update prebuilts script to use new host lib directory.

Change-Id: I5ac7a5fd78d194e69e4713f057ecb45401bdd637
diff --git a/update_rs_prebuilts.sh b/update_rs_prebuilts.sh
index 2f0163b..362a0c0 100755
--- a/update_rs_prebuilts.sh
+++ b/update_rs_prebuilts.sh
@@ -45,6 +45,9 @@
 # HOST_LIB_DIR allows us to pick up the built librsrt_*.bc libraries.
 HOST_LIB_DIR=$ANDROID_HOST_OUT/lib
 
+# HOST_LIB64_DIR
+HOST_LIB64_DIR=$ANDROID_HOST_OUT/lib64
+
 # PREBUILTS_DIR is where we want to copy our new files to.
 PREBUILTS_DIR=$MY_ANDROID_DIR/prebuilts/sdk/
 
@@ -130,7 +133,7 @@
 
     for a in `find renderscript/lib/$t -name \*.bc`; do
       file=`basename $a`
-      cp `find $HOST_LIB_DIR $sys_lib_dir $obj_lib_dir -name $file | head -1` $a || exit 5
+      cp `find $HOST_LIB_DIR $HOST_LIB64_DIR $sys_lib_dir $obj_lib_dir -name $file | head -1` $a || exit 5
     done
   done