pkg: fix solaris packaging

added new profile to build solaris package:

$ mvn package -am -pl packages/fhs -P pkg

This is the old package format, but still supported by
Oracle Solaris 11.

Target: master, 2.8, 2.7
Acked-by: Paul Millar
Require-book: no
Require-notes: yes
(cherry picked from commit 46027137d70a6626763df92f428146e47b62a456)
Signed-off-by: Tigran Mkrtchyan <tigran.mkrtchyan@desy.de>