Compile ntp on none-x86 platform

Download newest version from NTP website: http://www.ntp.org/downloads.html [crayon-68c1f2a70183b165716804/] You must indicate '--with-hardenfile=default' argument when your compile don't support libssp or else you will get errors seem as: [crayon-68c1f2a70183f055959081/] refs: https://gitlab.com/atilla/buildroot/commit/5766b6fb34a897092092f7d76d6b4f2bc8c48571