[GENLINK] Make tests in paralell

usage:

make genlinktests -j

speedup: 4 times on 8-core system

scripts/genlinktest.sh

@@ -30,12 +30,10 @@ awk -v PAT="$PAAT" -f scripts/genlink.awk $1.data > $1.out;
 
 #check test
 if ! diff -q $1.out $1.result >/dev/null; then
-	printf "FAILED\n";
 	exit 1;
 fi
 
 #remove workout only if it is OK
 rm -f $1.out
 
-printf "OK\n";
 exit 0