Fix for ARM

- This is also a cleaner implementation.  After DMTCP-2.2, we should use
  the same architecture for i386/x86_64


git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2682 ba6dc0ae-232f-0410-883f-9ebac64fc565
Add missing file for previous revision


git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2683 ba6dc0ae-232f-0410-883f-9ebac64fc565