fix arch-bits field

Author: facchinm

build/build.xml

@@ -59,7 +59,7 @@
   <condition property="arch-bits" value="64">
     <equals arg1="${platform}" arg2="linux64"/>
   </condition>
-  <condition property="arch-bits" value="32">
+  <condition property="arch-bits" value="64">
     <equals arg1="${platform}" arg2="linuxaarch64"/>
   </condition>