[R-sig-Fedora] Newest glibc split makes some packages fail to build

[Iñaki Ucar]

Hi,

See [1] and [2]. We need to keep an eye on what comes out from [3],
because if glibc-gconv-extra is not added to the buildroot, then
R-core-devel would need to put it in Requires. Otherwise, some R
packages fail to build due to missing converters.

[1] https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/thread/JQTTSNHMSFV63KIDDPW4M7WV7CI6KZYW/
[2] https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/thread/IWAOAD6XXXAPBQZ364OKVBZZXDDHG2KS/#IWAOAD6XXXAPBQZ364OKVBZZXDDHG2KS
[3] https://pagure.io/releng/issue/10176

-- 
Iñaki Úcar