Follow-up for less verbose logging

Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
diff --git a/tests/scripts/quiet/make b/tests/scripts/quiet/make
index d022551..6af3a57 100755
--- a/tests/scripts/quiet/make
+++ b/tests/scripts/quiet/make
@@ -16,4 +16,4 @@
 
 export TOOL="make"
 
-exec "$(dirname "$0")/quiet.sh" "$@"
+. "$(dirname "$0")/quiet.sh"