Do not install dmtcp_checkpoint symlink with -m32.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2427 ba6dc0ae-232f-0410-883f-9ebac64fc565
targetdir fix for ptrace with -m32.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2428 ba6dc0ae-232f-0410-883f-9ebac64fc565
Fix for -m32 install target.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2429 ba6dc0ae-232f-0410-883f-9ebac64fc565
Minor Makefile.in updates

- dmtcp/include/dmtcp.h and mtcp/mtcp.h are automatically installed by
  their respective Makefiles.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2430 ba6dc0ae-232f-0410-883f-9ebac64fc565