1) I updated the visit-create-chksums script to additionally create checksums
   for a couple of new binary distributions.

2) I modified the open build script to build the aix 32 bit and 64 bit
   versions concurently instead of serially, speeding up the open build
   process.



git-svn-id: http://visit.ilight.com/svn/visit/trunk/src@8158 18c085ea-50e0-402c-830e-de6fd14e8384