Fedora: Always install python3-devel

With the recent switch to py3 we need to ensure python3-devel is
installed on Fedora >= 29 before pip installing any dependencies.

Change-Id: I21417687db5b3827c5272ed22f6dc95db13f2870

Author: lyarwood

files/rpms/general

@@ -27,6 +27,7 @@ pkgconfig
 postgresql-devel  # psycopg2
 psmisc
 pyOpenSSL # version in pip uses too much memory
+python3-devel # f29,f30
 python-devel
 redhat-rpm-config # missing dep for gcc hardening flags, see rhbz#1217376
 systemd-devel # for systemd-python