Add the std spack header to perl/package.py
Add the std spack header to perl/package.py

Stole the example header from antlr/package.py, included it at the top
of perl/package.py.

mfherbst/spack,krafczyk/spack,LLNL/spack,iulian787/spack,matthiasdiener/spack,matthiasdiener/spack,LLNL/spack,iulian787/spack,TheTimmy/spack,iulian787/spack,TheTimmy/spack,krafczyk/spack,skosukhin/spack,LLNL/spack,tmerrick1/spack,krafczyk/spack,EmreAtes/spack,EmreAtes/spack,iulian787/spack,LLNL/spack,tmerrick1/spack,krafczyk/spack,mfherbst/spack,skosukhin/spack,tmerrick1/spack,krafczyk/spack,EmreAtes/spack,EmreAtes/spack,mfherbst/spack,lgarren/spack,matthiasdiener/spack,lgarren/spack,matthiasdiener/spack,lgarren/spack,iulian787/spack,mfherbst/spack,skosukhin/spack,skosukhin/spack,matthiasdiener/spack,TheTimmy/spack,skosukhin/spack,TheTimmy/spack,tmerrick1/spack,LLNL/spack,EmreAtes/spack,tmerrick1/spack,lgarren/spack,lgarren/spack,TheTimmy/spack,mfherbst/spack