olsrd: record why the version check logs "Terminated"

olsrd leaves through olsr_exit(), which ends the process with
raise(SIGTERM) rather than returning from main, so the shell reports
"Terminated" right after the version banner even for a plain
`olsrd -v`. The pipeline status comes from grep, so the check itself
is unaffected, but the line in the CI log looks like a failure to
anyone reading it.

Note it in the script so the next reader does not go hunting.

Signed-off-by: Josef Schlehofer <pepe.schlehofer@gmail.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

net/olsrd/test-version.sh

@@ -4,6 +4,10 @@
 
 case "$PKG_NAME" in
 olsrd)
+	# olsrd leaves through olsr_exit(), which ends the process with
+	# raise(SIGTERM) even for -v, so the shell reports "Terminated"
+	# after the banner. The pipeline status comes from grep, so the
+	# check is unaffected.
 	olsrd -v 2>&1 | grep -F "$PKG_VERSION"
 	;;