Fix file permissions

board/MAI/bios_emulator/scitech/bin/qnx4.sh

board/MAI/bios_emulator/scitech/bin/qnxnto.sh

board/MAI/bios_emulator/scitech/bin/set-vars-beos.sh

board/MAI/bios_emulator/scitech/bin/set-vars-freebsd.sh

board/MAI/bios_emulator/scitech/bin/set-vars-linux.sh

board/MAI/bios_emulator/scitech/bin/set-vars-qnx.sh

board/MAI/bios_emulator/scitech/bin/set-vars.bat

board/MAI/bios_emulator/scitech/bin/vc40-c32.bat

board/MAI/bios_emulator/scitech/bin/vc40-d16.bat

board/MAI/bios_emulator/scitech/bin/vc40-drv9x.bat

board/MAI/bios_emulator/scitech/bin/vc40-drvnt.bat

board/MAI/bios_emulator/scitech/bin/vc40-snp.bat

board/MAI/bios_emulator/scitech/bin/vc40-tnt.bat

board/MAI/bios_emulator/scitech/bin/vc40-w16.bat

board/MAI/bios_emulator/scitech/bin/vc40-w32.bat

board/MAI/bios_emulator/scitech/bin/vc40-x11.bat

board/MAI/bios_emulator/scitech/bin/vc50-c32.bat

board/MAI/bios_emulator/scitech/bin/vc50-d16.bat

board/MAI/bios_emulator/scitech/bin/vc50-drv9x.bat

board/MAI/bios_emulator/scitech/bin/vc50-drvnt.bat