Bug fix for r2451.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2452 ba6dc0ae-232f-0410-883f-9ebac64fc565
Fixed dmtcp_launch flag for infiniband.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2453 ba6dc0ae-232f-0410-883f-9ebac64fc565