Makefile, nifs: add a nifs-clean target and run with erlang-clean
Makefile, nifs: add a nifs-clean target and run with erlang-clean

scalaris-team/scalaris,scalaris-team/scalaris,scalaris-team/scalaris,scalaris-team/scalaris,scalaris-team/scalaris,scalaris-team/scalaris,scalaris-team/scalaris,scalaris-team/scalaris