Fix python3 version for rpm distros

pythonX.Y version is virtually provided since long[1], and
pythonXY-devel no longer provided in latest CentOS and Fedora
releases.
So switching to use pythonX.Y-devel as that will also pull pythonX.Y
as a dependency.

Additionally install pythonX.Y-pip as for rpm distros it don't install
pip via source.

[1] https://src.fedoraproject.org/rpms/python3/c/75005c20f68f3b4ceb734e876b37009c8c3b99f3

Change-Id: I990586cce876533c67e3da4c97d9e5995c762340
1 file changed