bindep: Install python3 and python3-devel on CentOS 8 and Fedora

python-devel is no longer available on either distro, both should now
use python3 and python3-devel packages.

Change-Id: I51eb3c6626aec9842cb756d7f97c683c77479401

bindep.txt

@@ -38,11 +38,10 @@ postgresql-client [platform:dpkg]
 postgresql-devel [platform:rpm test]
 postgresql-server [platform:rpm]
 python-dev [platform:dpkg test]
-python-devel [platform:rpm test]
 python3-all [platform:dpkg]
 python3-all-dev [platform:dpkg]
-python3-devel [platform:fedora]
-python34-devel [platform:centos]
+python3 [platform:rpm test]
+python3-devel [platform:rpm test]
 sqlite-devel [platform:rpm test]
 texlive [pdf-docs]
 texlive-latex-recommended [pdf-docs]