add ACLOCAL_PATH updates for packages that register m4 macros (#2518)
add ACLOCAL_PATH updates for packages that register m4 macros (#2518)


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