RHEL7.4 now supports %gemspec_{add,remove}_dep macros

[Vít Ondruch]

Hi all,

There is good news for those interested in packaging rubygems for RHEL7,
since RHEL 7.4 (released yesterday) now supports the same set of macros
as Fedora. For the details, please see:

https://bugzilla.redhat.com/show_bug.cgi?id=1397390

Vít