Update rtinst

scripts/rtinst

@@ -263,11 +263,11 @@ if [ "$(id -u)" != "0" ]; then
 fi
 
 # determine system
-if ([ "$osname" = "Ubuntu" ] && [ $relno -ge 14 ]) || ([ "$osname" = "Debian" ] && [ $relno -ge 8 ])  || ([ "$osname" = "Raspbian" ] && [ $relno -ge 8 ]); then
+if ([ "$osname" = "Ubuntu" ] && [ $relno -ge 14 ] && [ $relno -le 15 ]) || ([ "$osname" = "Debian" ] && [ $relno -eq 8 ]) || ([ "$osname" = "Raspbian" ] && [ $relno -eq 8 ]); then
   echo $fullrel
 else
  echo $fullrel
- echo "Only Ubuntu release 14 and later, and Debian and Raspbian release 8 and later, are supported"
+ echo "Only Ubuntu release 14 and 15, and Debian and Raspbian release 8 are supported"
  echo "Your system does not appear to be supported"
  echo "Check https://github.com/arakasi72/rtinst/wiki/Installing-on-Older-OS to see if it is supported by an earlier rtinst release"
  exit