pmdabcc: create relative not absolute symlinks
pmdabcc: create relative not absolute symlinks

Relative symlinks should be more appropriate here.

Also create symlinks in the root BCC PMDA directory if needed.

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