perl and python version update

[Ken Cunningham]

On 2021-06-02, at 8:56 AM, Marius Schamschula wrote:


> 
> Somehow FreeBSD can do w/o Python 2.7 (as of Python 2.7 EOL, FreeBSD 12.2 IIRC). They have the same llvm/clang infrastructure as macOS/MacPorts.
> 

for example:

https://trac.macports.org/ticket/62308


In addition to bootstrapping (for which we'll need python27 or python27-bootstrap forever), at present we support things like llvm/clang 5.0 to 9.0 that need python27 to build.

And who knows how many other older ports we don't want to ditch yet.

K