Makefile: remove ./ from build targets
Makefile: remove ./ from build targets

Improves compatibility with FreeBSD

luarocks/luarocks,keplerproject/luarocks,keplerproject/luarocks,keplerproject/luarocks,tarantool/luarocks,tarantool/luarocks,tarantool/luarocks,keplerproject/luarocks,luarocks/luarocks,luarocks/luarocks