spread.yaml: fix capturing of captured spread functions

We need to execute the functions, not just define them.

Signed-off-by: Zygmunt Krynicki <zygmunt.krynicki@huawei.com>

spread.yaml

@@ -39,6 +39,7 @@ prepare: |
     # "MATCH is a function", the rest is valid shell.
     for fn in MATCH NOMATCH; do
         type "$fn" | tail -n +2 >> $SPREAD_PATH/tests/bin/"$fn"
+        echo "$fn \"\$@\"" >> $SPREAD_PATH/tests/bin/"$fn"
     done
 
     # Build and install locally