kdump-load/save-dumps: Fix some return code on errors

We have been way too conservative to prevent boot flaws, returning
always success even on failures. This is changed now.

Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>

save-dumps.sh

@@ -30,7 +30,7 @@ rm -f "${KDUMP_MNT}"
 
 if [ ! -d "${KDUMP_MAIN_FOLDER}" ]; then
 	logger "kdump: invalid folder (${KDUMP_MAIN_FOLDER}) - aborting..."
-	exit 0
+	exit 1
 fi
 
 LOGS_FOUND=0