GMsh: Fix binary linking against its own libraries
GMsh: Fix binary linking against its own libraries

GMsh binary now links against full path name of libraries. This fixes
problems, such as `dyld: Library not loaded: libGmsh.2.11.dylib`, when
running the executable.
matthiasdiener/spack,skosukhin/spack,iulian787/spack,mfherbst/spack,krafczyk/spack,tmerrick1/spack,iulian787/spack,TheTimmy/spack,lgarren/spack,matthiasdiener/spack,mfherbst/spack,EmreAtes/spack,TheTimmy/spack,EmreAtes/spack,skosukhin/spack,krafczyk/spack,tmerrick1/spack,matthiasdiener/spack,LLNL/spack,krafczyk/spack,mfherbst/spack,lgarren/spack,mfherbst/spack,tmerrick1/spack,EmreAtes/spack,skosukhin/spack,skosukhin/spack,TheTimmy/spack,LLNL/spack,iulian787/spack,iulian787/spack,TheTimmy/spack,iulian787/spack,EmreAtes/spack,tmerrick1/spack,krafczyk/spack,LLNL/spack,krafczyk/spack,lgarren/spack,matthiasdiener/spack,TheTimmy/spack,lgarren/spack,LLNL/spack,matthiasdiener/spack,lgarren/spack,mfherbst/spack,EmreAtes/spack,tmerrick1/spack,skosukhin/spack,LLNL/spack