[R-sig-Fedora] tzdata requirement

[Tim Taylor]

I'm very ignorant of the building of rpms and spec files but should R 
have a requirement (both build and run) tzdata? I was exploring the spec 
file and couldn't see it mentioned but, AFAICT, it is required unless 
you are using the optional bundled data base.

My curiosity was triggered after reading the recent thread on devel 
(https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/thread/CRUWIEHISRLYQ5ZLPFSAFJPRTDQQLBO2/) 
and then seeing that the related change request was recently approved 
(https://pagure.io/fesco/issue/3031).

Apologies for the noise if I'm misunderstanding how things work.

Cheers

Tim