prerequisites.sh: Update for Ubuntu 16.04 Xenial and 18.04 Bionic (v2…

….2.3)

:Release Notes:
The old version works ok with new Ubuntu releases, no changes were
needed, so just add the new version and codename to *_sane variables.

:Detailed Notes:

:Testing Performed:
Only build tested.

:QA Notes:

:Issues Addressed:
[PLAT-57836] Update build script for Ubuntu 18.04
[PLAT-64784] [OSE] CCC: Update build script for Ubuntu 18.04 II

scripts/prerequisites.sh

@@ -18,7 +18,7 @@
 
 check_sanity=true
 usage="$0 [--help|-h] [--version|-V] [--force|-f]"
-version="2.2.2"
+version="2.2.3"
 statusfile="/etc/webos.prerequisites"
 
 for i ; do
@@ -62,8 +62,8 @@ fi
 sane=true
 
 distributor_id_sane="^Ubuntu$"
-release_sane="^14.04$"
-codename_sane="^trusty$"
+release_sane="^14.04$|^16.04$|^18.04$"
+codename_sane="^trusty$|^xenial$|^bionic$"
 arch_sane="^amd64$"
 
 case "${check_sanity}" in