Detect whether GCC supports java.  Don't dump .s files from the test in the
working directory, send them to /dev/null.


git-svn-id: https://llvm.org/svn/llvm-project/dragonegg/trunk@176081 91177308-0d34-0410-b5e6-96231b3b80d8
O/S independent /dev/null.


git-svn-id: https://llvm.org/svn/llvm-project/dragonegg/trunk@176082 91177308-0d34-0410-b5e6-96231b3b80d8