JLink files do not have execute permissions

JLinkExe does not have execute permissions in these directories

bootloader-tools/jlink/osx
bootloader-tools/jlink/linux/i386
bootloader-tools/jlink/linux/x86_64

[estutzenberger]

Fixed

Linux files (both architectures) got +x removed again. macOS is OK.

Just got a customer report that the macOS directory needs chmod +x JLinkARM.dll