ntp: Upgrade with security fixes in ntp

The upgrade is fixing several known security issues. Let's update it.

Fixes: SYS#2449

recipes-bsp/ntp/ntp_4.2.8p6.bb

@@ -27,8 +27,8 @@ SRC_URI = "http://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-4.2/ntp-${PV}.tar.g
 
 PR = "r9"
 
-SRC_URI[md5sum] = "65d8cdfae4722226fbe29863477641ed"
-SRC_URI[sha256sum] = "948274b88f1ed002d867ced6aaefdfd0999668b11285ac2b3a67ff2629d59d88"
+SRC_URI[md5sum] = "60049f51e9c8305afe30eb22b711c5c6"
+SRC_URI[sha256sum] = "583d0e1c573ace30a9c6afbea0fc52cae9c8c916dbc15c026e485a0dda4ba048"
 
 inherit autotools update-rc.d useradd systemd pkgconfig