Description:
    Set OUTPUT_DIRECTORY to cpplus_RM and HTML_OUTPUT to '.' because
    they were reset by accident causing "bin/release doc" to fail.

    Ran bin/release to verify the failure was gone.



git-svn-id: https://svn.hdfgroup.uiuc.edu/hdf5/trunk@25202 dab4d1a6-ed17-0410-a064-d1ae371a2980