debian/libpcp3-dev.install: add per-context derived metric man pages
debian/libpcp3-dev.install: add per-context derived metric man pages

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