databases/mariadb102-server: Fix client ports and build

• Move client headers to the client port [1]
• Fix SNAPPY option for mariabackup [2]
  • switch to noninja to generate link.txt

PR: 222825 [1], 221159 [2]
Submitted by: Piotr Kubaj <pkubaj@anongoth.pl> [1]
Reported by: sdalu@sdalu.com [2]