scripts: west_commands: runners: jlink: support pylink >= 0.14.2

It looks like the latest release, 0.14.2, changed the contents of
JLINK_SDK_NAME as it was before 0.14.0 release. That means that the
previous fix is only applicable to a couple of releases: 0.14.0/0.14.1.

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>