debian/pcp-doc.install: update manifest
debian/pcp-doc.install: update manifest

1. remove dups
2. add missing files

After this, we seem to have got rid of this error from apt-get ...

    Unpacking pcp (4.0.0) over (4.0.0) ...
    dpkg: error processing archive /tmp/apt-dpkg-install-TPG5NJ/09-pcp_4.0.0_i386.deb (--unpack):
     trying to overwrite '/usr/share/doc-base/pcp-doc', which is also in package pcp-doc 4.0.0

adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp