Comment out DPRINTF's in threadlist.cpp::stopthisthread

This DPRINTFS can cause deadlock with dmtcp malloc plugin.



git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2666 ba6dc0ae-232f-0410-883f-9ebac64fc565
[RM plugin]

Make hellompi.c more flexible in work amount sense. 



git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2667 ba6dc0ae-232f-0410-883f-9ebac64fc565