Added support to run the test suite using a ram disk (this uses tmpfs available 
on Linux and some BSDs)

Note: Running the test suite on a SSD is really fast, but on a normal harddrive 
it is painfully slow.


git-svn-id: http://svn.gna.org/svn/etoile/trunk/Etoile/Frameworks/CoreObject@10037 7b3f36aa-e6db-49c1-8b4c-66eac1997e64