I added the "--enable-threadsafe --with-pthread" options.
I had to add a patch to the HDF5 1.8.7 library to have it build right with the "--enable-threadsafe" 
option. It will only apply the patch if VisIt is built in thread mode.
I found that HDF5 1.8.13 was the only version that built fine with the "--enable-threadsafe"
option, but there were problems building the silo library with that version.

Also removed the cf_darwin flag, it was always blank and it was used were we should have been
using cf_build_type in the info part of the build.



git-svn-id: http://visit.ilight.com/svn/visit/trunk/src@23898 18c085ea-50e0-402c-830e-de6fd14e8384