automake: clean-up install rules and properly respect DESTDIR
automake: clean-up install rules and properly respect DESTDIR

jackmitch/libsoc,janick/libsoc,janick/libsoc,jackmitch/libsoc,yegorich/libsoc,hlummis/libsoc,janick/libsoc,jackmitch/libsoc,hlummis/libsoc,hlummis/libsoc,yegorich/libsoc,yegorich/libsoc,hlummis/libsoc,janick/libsoc