Add RPM packaging Makefile previously missed due to .gitignore
Add RPM packaging Makefile previously missed due to .gitignore

sieutruc/qpsmtpd,sieutruc/qpsmtpd,msimerson/qpsmtpd,msimerson/qpsmtpd,priyadi/qpsmtpd,priyadi/qpsmtpd,smtpd/qpsmtpd,priyadi/qpsmtpd,sieutruc/qpsmtpd,smtpd/qpsmtpd,salvis/qpsmtpd,salvis/qpsmtpd