[CentOS] CentOS 7 (2009) in progress

OK all .. RHEL 7.9 source code updated today.

I am currently working to start the build of CentOS 7 based on that [CentOS 7 (2009) ].

Currently, we need to bootstrap and then build llvm-toolset-9.0 and rust-toolset-1.41 as some of the released packages need those toolsets.  I also need to check devtoolset-7 and devtoolset-8 and see if we need any updates to pacakges there before we start the main build .. and I need to see of any of the packages need devtoolset-9.

Once we have all those prerequisites completed, I can start the main builds.

The goal, as usual, is to get the CR repo populated in 7 to 10 days: https://wiki.centos.org/AdditionalResources/Repositories/CR

And the final release completed in less than 40 days.

Thanks, Johnny Hughes