Add RPM specifiacation

[mkgrgis]

Create rpm.spec.
In continue of #39

Based on

• https://rpm-software-management.github.io/rpm/manual/spec.html
• https://github.com/scj643/sqlite_fdw/tree/master
• rpm.spec from https://rhel.pkgs.org/9/postgresql-14-x86_64/sqlite_fdw_14-2.3.0-1.rhel9.x86_64.rpm.html

Thanks to @scj643 and @devrimgunduz

[t-kataym]

@mkgrgis , Thank you for creating the PR.
Is it no problem to start the review?

@MinhLA1410 ,
Please review it if it is ready.

[mkgrgis]

@mkgrgis , Thank you for creating the PR. Is it no problem to start the review?

Yes, no problems. I'll study about RPM directive words if there will detected any problems.

[MinhLA1410]

Hi @mkgrgis
I tried to build rpm file from your spec. But it does not work. Could you please check again

error: parse error in expression
error: ${HOME}/sqlite_fdw/rpm.spec:25: bad %if condition

[mkgrgis]

Thanks, @MinhLA1410 ! I'll try to get rpm environment, reproduce this problem and check again.

[devrimgunduz]

Why are you trying to add spec file to sqlite_fdw repo? I'm already maintaining it in upstream repo. Also this spec file depends lots of things in the PostgreSQL RPM repo, it is not a standalone one.

[mkgrgis]

Hello, @devrimgunduz ! Thanks for reply and for rpms :-) . I try to add spec file because i want to get rpm files for my colleagues with some new features or with my experiments for user testing. Your rpm files with sqlite_fdw likes me because there is good implementation of lifecycle processes.