add flex variant to cscope (#3252)
add flex variant to cscope (#3252)

* add flex variant to cscope

* fixed dependency

* fixed typo

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