security/sssd: fix package with SMB=on
When the option SMB is ON, the port fails to package.
While here:
- Reorder Makefile variables
- Change obsolete @unexec to @postexec
- Rework patches to comply with makepatch format
PR: 244778
Submitted by: tommyhp2@gmail.com
Approved by: lukas.slebodnik@intrak.sk (maintainer, timeout)