adjust libserf and add libmagic-dev
adjust libserf and add libmagic-dev

centic9/subversion-ppa,centic9/subversion-ppa,centic9/subversion-ppa,centic9/subversion-ppa,centic9/subversion-ppa,centic9/subversion-ppa,centic9/subversion-ppa,centic9/subversion-ppa