Issue 2395: Updated tests to be skipped on systems without os.symlink functionality.     Apparently, the SConsTest.symlink behavior doesn't give any success/fail feedback.
Issue 2395: Updated tests to be skipped on systems without os.symlink functionality.
    Apparently, the SConsTest.symlink behavior doesn't give any success/fail feedback.

timj/scons,timj/scons,timj/scons,timj/scons,timj/scons,timj/scons,timj/scons,timj/scons,timj/scons