Quote the PERL5OPT in the generic harness

scripts/harness.sh

@@ -44,7 +44,7 @@ do
 done
 
 if [ ${#PERL5OPT_array[@]} -ne 0 ]; then
-    PERL5OPT=$(join_array ' ' ${PERL5OPT_array[@]})
+    PERL5OPT=\'$(join_array ' ' ${PERL5OPT_array[@]})\'
     echo "Using PERL5OPT=$PERL5OPT"
 fi