Fix #2740, using PRESERVE with runtest.py.
Fix #2740, using PRESERVE with runtest.py.

git-svn-id: 7892167f69f80ee5d3024affce49f20c74bcb41d@5216 fdb21ef1-2011-0410-befe-b5e4ea1792b1

azverkan/scons,azverkan/scons,azverkan/scons,azverkan/scons,azverkan/scons