WIP: check_software: check #! in scripts installed by softwares
Some software install scripts with a #!/ line refering to a system program, such as for example #!/usr/bin/python . Later when they are executed this may fail because the system program might not be present or might not be the wrong version.
This extends the software check to detect these and flag them as errors. Software release authors will have to adjust the generated scripts, for example by using post build step.