Fix for bgo#583274 - portability for orca script
Fix for bgo#583274 - portability for orca script

This makes the Orca script a sh script instead of a bash script

pvagner/orca,h4ck3rm1k3/orca-sonar,pvagner/orca,chrys87/orca-beep,GNOME/orca,pvagner/orca,chrys87/orca-beep,pvagner/orca,chrys87/orca-beep,h4ck3rm1k3/orca-sonar,GNOME/orca,GNOME/orca,h4ck3rm1k3/orca-sonar,GNOME/orca,chrys87/orca-beep