Appease portlint by reordering some items in the Makefile

Group FOO_DESC with all the other options helpers for option FOO

When DOCS are enabled and one or both of MYSQL and PGSQL options are
selected, install the corresponding createDB.sql file for generating
the DB schema rsyslog expects [1]

PR: 221012
Reported by: rainer@ultra-secure.de [1]