Add RPM build instructions

[marcosfrm]

Differences from https://github.com/FoldingAtHome/fah-client-bastet/issues/153#issuecomment-1764926549:

• Since https://github.com/FoldingAtHome/fah-client-bastet/commit/2ca272ee0e3a586d58e3fee684f26639aebad072 we do not need libstdc++-static anymore on Fedora/RHEL.
• I added zlib-devel and bzip2-devel (libbz2-devel on openSUSE) in the prerequisites, as commented in https://github.com/FoldingAtHome/fah-client-bastet/discussions/182#discussioncomment-8470199.

I think we should add zlib1g-dev and libbz2-dev to the DEB instructions too... what do you think?

@kbernhagen

[marcosfrm]

About "Before installing this package it is recommend that you first uninstall any previous Folding@home client software."...

The v8 package conflicts with the old v7 one, which will cause its automatic removal. This is an overzealous recommendation, as it may lead users to remove previous v8 versions, when it would be perfectly normal to update without removing anything.

[kbernhagen]

Does Arch Linux need its own section for prerequisites? Maybe uses pacman?

[marcosfrm]

Arch does not use RPM. 🤷‍♂️

[marcosfrm]

New version. Please take a look.

[jcoffland]

Thanks!