README: piglit requires results-file for testruns

Noticed by Mika.

diff --git a/README b/README
index 789b8c2..0ec53fb 100644 (file)
--- a/README
+++ b/README
@@ -51,7 +51,7 @@ tests/
        can run the testcases with (as usual as root, no other drm clients
        running):
 
-       piglit-sources # ./piglit-run.py tests/igt.tests
+       piglit-sources # ./piglit-run.py tests/igt.tests <results-file>
 
        The testlist is built at runtime, so no need to update anything in
        piglit when adding new tests. See